The On-Line Encyclopedia of Integer Sequences (OEIS)

Revision History for A002879 (Bold, blue-underlined text is an addition; faded, red-underlined text is a ~~deletion~~.)
Showing entries 1-10 | older changes

A002879

Number of ways of getting a straight flush, 4 of a kind, full house, flush, straight, 3 of a kind, 2 pair, a pair, nothing in a 7-card poker hand.
(history; published version)

#40 by Joerg Arndt at Fri Aug 23 04:07:50 EDT 2019

DATA

41584, 224848, 3583008, 3473184, 4047644, 6180020, 6461620, 31433400, 58627800, 23294460

COMMENTS

a(3) = 3583008, the old value 3473184 is improper due to reason the number is out of bounds MinMax range for full houses [3541824, 4047264] > 3473184. The author of original paper have cutoff 1/2 of full house combinations like XXXYYYZ. - Andrey Vetrov, May 21 2019

EXTENSIONS

a(3) corrected by Andrey Vetrov, May 21 2019

STATUS

editing

approved

#39 by Jon E. Schoenfield at Wed May 22 22:47:35 EDT 2019

STATUS

proposed

editing

Discussion

Fri Aug 09

02:49

OEIS Server: This sequence has not been edited or commented on for a week
yet is not proposed for review.  If it is ready for review, please
visit https://oeis.org/draft/A002879 and click the button that reads
"These changes are ready for review by an OEIS Editor."

Thanks.
  - The OEIS Server

Wed Aug 14

13:08

Andrew Howroyd: I think the original value is correct. (perhaps I am making a mistake, but I'll present my reasoning). There are three possibilities: a) [3,2,1,1] b) [3,2,2] c) [3,3,1] where the notation [3,2,2] means 1 triple + 2 pairs. The sums for each of these are a) 13*12*11*10*4*6*4*4/2 b) 13*12*11*4*6*6/2 c) 13*12*11*4*4*4/2. In each case there is a division by 2: for example when considering [3,3,1] there are 13*12/2 ways to pick the two ranks that will have 3 cards each.

Wed Aug 21

13:15

OEIS Server: This sequence has not been edited or commented on for a week
yet is not proposed for review.  If it is ready for review, please
visit https://oeis.org/draft/A002879 and click the button that reads
"These changes are ready for review by an OEIS Editor."

Thanks.
  - The OEIS Server

#38 by Jon E. Schoenfield at Wed May 22 22:47:23 EDT 2019

STATUS

editing

proposed

#37 by Sean A. Irvine at Wed May 22 22:37:31 EDT 2019

STATUS

proposed

editing

Discussion

Wed May 22

22:47

Jon E. Schoenfield: (The new Comments entry has multiple serious grammatical problems, but I'm waiting for the questions about the mathematical content to be resolved.)

#36 by Sean A. Irvine at Wed May 22 22:37:23 EDT 2019

STATUS

editing

proposed

#35 by Sean A. Irvine at Wed May 22 22:25:55 EDT 2019

COMMENTS

a(3) = 3583008, the old value 3473184 is improper due to reason the number is out of bounds MinMax range for Fullhouses full houses [3541824, 4047264] > 3473184. The author of original paper have cutoff 1/2 of FH full house combinations like XXXYYYZ. - Andrey Vetrov, May 21 2019

STATUS

proposed

editing

Discussion

Wed May 22

22:34

Sean A. Irvine: Something is wrong with this change.  The total number of hands is C(52,7).  So you cannot increase the number of full houses in this sequence without decreasing something else.  That is, the sum of the values in this sequence must be C(52,7) (which it was before you changed it).

22:36

Sean A. Irvine: I also do not understand why you have min and max bounds, why are they needed, this number can be computed exactly.

#34 by Michel Marcus at Wed May 22 10:52:59 EDT 2019

STATUS

editing

proposed

Discussion

Wed May 22

22:36

Jon E. Schoenfield: "full house" is not one word

#33 by Michel Marcus at Wed May 22 10:52:53 EDT 2019

EXTENSIONS

a(3) corrected by _Andrey Vetrov_, May 21 2019

STATUS

proposed

editing

#32 by Andrey Vetrov at Wed May 22 06:37:00 EDT 2019

STATUS

editing

proposed

Discussion

Wed May 22

08:54

Andrey Vetrov: Can someone examine formula for a(3)? https://www.wolframcloud.com/obj/b6e017b6-9d88-4468-9dea-016f2a9e7343

#31 by Andrey Vetrov at Tue May 21 15:45:04 EDT 2019

COMMENTS

a(3) = 3583008, the old value 3473184 is improper due to reason the number is out of bounds MinMax range for Fullhouses [3541824, 4047264] > 3473184. The author of original paper have cutoff 1/2 of FH combinations like XXXYYYZ. - _Andrey Vetrov_, May 21 2019

Discussion

Tue May 21

15:47

Andrey Vetrov: Is it ok?