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A155894 Least positive integer such that a(n)! starts with n, both written in base 16. 3
1, 2, 10, 36, 9, 3, 5, 24, 8, 43, 82, 25, 30, 46, 64, 62, 60, 68, 7, 14, 70, 18, 13, 4, 31, 272, 19, 12, 97, 35, 161, 140, 20, 86, 27, 74, 131, 11, 502, 234, 47, 181, 386, 21, 6, 996, 52, 232, 144, 32, 393, 189, 199, 281, 10, 490, 39, 154, 83, 22, 28, 577, 63, 65, 88, 61, 115 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,2

LINKS

Table of n, a(n) for n=1..67.

PROG

(PARI) A155894(n)={ local( F=1, k=1 ); while( F\1!=n, F*=k++; while( F>=n+1, F/=16 )); k}

CROSSREFS

Cf. A155891--A155893, A018799, A076219.

Sequence in context: A135963 A140954 A309889 * A317454 A244715 A212573

Adjacent sequences:  A155891 A155892 A155893 * A155895 A155896 A155897

KEYWORD

base,nonn

AUTHOR

M. F. Hasler, Feb 01 2009

STATUS

approved

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Last modified September 22 02:48 EDT 2021. Contains 347605 sequences. (Running on oeis4.)