The On-Line Encyclopedia of Integer Sequences (OEIS)

Revision History for A244955 (Bold, blue-underlined text is an addition; faded, red-underlined text is a ~~deletion~~.)
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A244955

Smallest positive multiple of n whose base-4 representation contains only 0's and 1's.
(history; published version)

#16 by OEIS Server at Thu Feb 01 16:05:11 EST 2024

LINKS

Harvey P. Dale, <a href="/A244955/b244955_1.txt">Table of n, a(n) for n = 1..1000</a>

#15 by Harvey P. Dale at Thu Feb 01 16:05:11 EST 2024

STATUS

editing

approved

Discussion

Thu Feb 01

16:05

OEIS Server: Installed new b-file as b244955.txt.  Old b-file is now b244955_1.txt.

#14 by Harvey P. Dale at Thu Feb 01 16:05:07 EST 2024

DATA

0, 1, 4, 21, 4, 5, 84, 21, 16, 81, 20, 341, 84, 65, 84, 1365, 16, 17, 324, 1045, 20, 21, 1364, 69, 336, 325, 260, 81, 84, 261, 5460, 341, 64, 1089, 68, 1365, 324, 4181, 4180, 273, 80, 1025, 84, 5461, 1364, 5445, 276, 20821, 336, 1029, 1300, 4437, 260, 5141

OFFSET

0,3

1,2

LINKS

Eric MHarvey P. Schmidt, Dale, <a href="/A244955/b244955_1.txt">Table of n, a(n) for n = 01..1000</a>

MATHEMATICA

Module[{nn=10, b4}, b4=Rest[FromDigits[#, 4]&/@Tuples[{0, 1}, nn]]; Table[SelectFirst[b4, Mod[ #, n]==0&], {n, 60}]] (* Harvey P. Dale, Feb 01 2024 *)

EXTENSIONS

Data corrected, offset corrected, and b-file replaced by Harvey P. Dale, Feb 01 2024

STATUS

approved

editing

#13 by Joerg Arndt at Sun Jun 30 10:11:01 EDT 2019

STATUS

reviewed

approved

#12 by Felix Fröhlich at Sun Jun 30 10:07:54 EDT 2019

STATUS

proposed

reviewed

#11 by Jon E. Schoenfield at Sun Jun 30 09:38:03 EDT 2019

STATUS

editing

proposed

#10 by Jon E. Schoenfield at Sun Jun 30 09:38:00 EDT 2019

NAME

Smallest positive multiple of n whose base -4 representation contains only 0's and 1's.

STATUS

approved

editing

#9 by N. J. A. Sloane at Sat Jul 12 11:55:01 EDT 2014

STATUS

proposed

approved

#8 by Eric M. Schmidt at Sat Jul 12 11:08:22 EDT 2014

STATUS

editing

proposed

#7 by Eric M. Schmidt at Sat Jul 12 11:03:46 EDT 2014

LINKS

Ed Pegg Jr., <a href="http://www.mathpuzzle.com/Binary.html">'Binary' Puzzle</a>

Eric M. Schmidt, <a href="/A004290/a004290_1.sage.txt">Sage code to compute this sequence</a> (use b=4)

Chai Wah Wu, <a href="http://www.jstor.org/stable/10.4169/amer.math.monthly.121.06.529">Pigeonholes and repunits</a>, Amer. Math. Monthly, 121 (2014), 529-533.