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A093826 In binary representation: least number, k, which occurs n times in its factorial. 1
5, 1, 16, 12, 49, 58, 60, 110, 209, 117, 240, 430, 255, 1423, 921, 980, 511, 1847, 3737, 3692, 3998, 7265, 15267, 15651, 15722 (list; graph; refs; listen; history; text; internal format)
OFFSET

0,1

LINKS

Table of n, a(n) for n=0..24.

EXAMPLE

12!_b = 11100100011001111110000000000 and 12_b = 1100 and the later string appears thrice in the former string.

MATHEMATICA

f[n_] := ToString[ FromDigits[ IntegerDigits[n, 2]]]; g[n_] := Length[ StringPosition[ f[n! ], f[n]]]; a = Table[0, {30}]; Do[ b = g[n]; If[a[[b + 1]] == 0, a[[b + 1]] = n], {n, 29000}]; a

CROSSREFS

Cf. A093685.

Sequence in context: A221364 A211805 A211808 * A144699 A066787 A058352

Adjacent sequences:  A093823 A093824 A093825 * A093827 A093828 A093829

KEYWORD

nonn

AUTHOR

Robert G. Wilson v and Reinhard Zumkeller, Apr 16 2004

STATUS

approved

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Last modified September 21 19:57 EDT 2020. Contains 337273 sequences. (Running on oeis4.)