The On-Line Encyclopedia of Integer Sequences (OEIS)

Revision History for A196686 (Bold, blue-underlined text is an addition; faded, red-underlined text is a ~~deletion~~.)
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A196686

Number of odd digits of Pi minus number of even digits.
(history; published version)

#29 by OEIS Server at Thu Dec 30 07:27:05 EST 2021

LINKS

Zak Seidov, <a href="/A196686/b196686_1.txt">Table of n, a(n) for n = 1..10000</a> [a(10000) corrected by Georg Fischer, Dec 29 2021]

#28 by Peter Luschny at Thu Dec 30 07:27:05 EST 2021

STATUS

reviewed

approved

Discussion

Thu Dec 30

07:27

OEIS Server: Installed new b-file as b196686.txt.  Old b-file is now b196686_1.txt.

#27 by Michel Marcus at Thu Dec 30 02:31:57 EST 2021

STATUS

proposed

reviewed

#26 by Kevin Ryde at Wed Dec 29 22:10:03 EST 2021

STATUS

editing

proposed

#25 by Kevin Ryde at Wed Dec 29 22:09:28 EST 2021

CROSSREFS

Cf. A030657, A175792 (negated), A175813 (indices of 0's).

STATUS

proposed

editing

#24 by Georg Fischer at Wed Dec 29 07:55:08 EST 2021

STATUS

editing

proposed

#23 by Georg Fischer at Wed Dec 29 07:54:58 EST 2021

MATHEMATICA

rd=RealDigits[N[Pi, 1000010004]][[1]]; a=0; s=Reap[Do[a=a+2Mod[rd[[n]], 2]-1; Sow[{n, a}], {n, 1000010004}]][[2, 1]]; (* this gives b-file *) (* Zak Seidov, Oct 05 2011 *)

#22 by Georg Fischer at Wed Dec 29 07:52:05 EST 2021

NAME

Excess of number Number of odd digits over of Pi minus number of even digits of Pi.

LINKS

Zak Seidov, <a href="/A196686/b196686_1.txt">Table of n, a(n) for n = 1..10000</a> [a(10000) corrected by _Georg Fischer_, Dec 29 2021]

EXTENSIONS

Definition amended by Georg Fischer, Dec 29 2021

STATUS

approved

editing

Discussion

Wed Dec 29

07:54

Georg Fischer: The MMA yields a(10000) = 60 with parameter 10000, but 62 with 10004, and jOEIS also yields 62.

#21 by Charles R Greathouse IV at Tue Oct 30 10:31:02 EDT 2018

LINKS

Moshe Levin, Zak Seidov, <a href="/A196686/b196686.txt">Table of n, a(n) for n = 1..10000</a>

Moshe Levin, Zak Seidov, <a href="https://oeis.org/wiki/File:A196686Fig1.jpg">Dependence a(n) for n = 1..10000</a>

Moshe Levin, Zak Seidov, <a href="https://oeis.org/wiki/File:A196686Fig2.jpg">Dependence a(n) for n = 1..10^6</a>

MATHEMATICA

rd=RealDigits[N[Pi, 10000]][[1]]; a=0; s=Reap[Do[a=a+2Mod[rd[[n]], 2]-1; Sow[{n, a}], {n, 10000}]][[2, 1]]; (* this gives b-file *) (* _Moshe Levin_, Zak Seidov_, Oct 05 2011 *)

AUTHOR

_Moshe Levin_, Zak Seidov_, Oct 05 2011

Discussion

Tue Oct 30

10:31

OEIS Server: https://oeis.org/edit/global/2771

#20 by Joerg Arndt at Tue Jun 02 07:53:25 EDT 2015

STATUS

reviewed

approved