The On-Line Encyclopedia of Integer Sequences (OEIS)

Revision History for A045051 (Bold, blue-underlined text is an addition; faded, red-underlined text is a ~~deletion~~.)
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A045051

Numbers whose base-4 representation contains exactly two 0's and four 2's.
(history; published version)

#18 by Michel Marcus at Sun May 28 01:39:32 EDT 2023

STATUS

reviewed

approved

#17 by Joerg Arndt at Sun May 28 00:48:25 EDT 2023

STATUS

proposed

reviewed

#16 by Jon E. Schoenfield at Sun May 28 00:41:52 EDT 2023

STATUS

editing

proposed

#15 by Jon E. Schoenfield at Sun May 28 00:41:49 EDT 2023

NAME

Numbers n with property that in whose base -4 representation the numbers of contains exactly two 0's and four 2's are 2 and 4, respectively.

CROSSREFS

Cf. A007090.

STATUS

approved

editing

#14 by N. J. A. Sloane at Mon Dec 04 08:59:53 EST 2017

STATUS

proposed

approved

#13 by Michel Marcus at Mon Dec 04 03:26:21 EST 2017

STATUS

editing

proposed

#12 by Michel Marcus at Mon Dec 04 03:26:06 EST 2017

PROG

# Enrique Pérez Herrero, Dec 03 2017

STATUS

proposed

editing

Discussion

Mon Dec 04

03:26

Michel Marcus: please sign after program (done)

#11 by Michael De Vlieger at Sun Dec 03 21:05:07 EST 2017

STATUS

editing

proposed

#10 by Michael De Vlieger at Sun Dec 03 21:05:02 EST 2017

MATHEMATICA

Select[Range[4^4, 4^7], {#4, #2} == {2, 4} & @@ DigitCount[#, 4] &] (* Michael De Vlieger, Dec 03 2017 *)

STATUS

proposed

editing

#9 by Enrique Pérez Herrero at Sun Dec 03 18:07:52 EST 2017

STATUS

editing

proposed