A136702 Final nonzero digit of n! in base 16.

1, 1, 2, 6, 8, 8, 13, 11, 8, 8, 15, 5, 12, 12, 8, 8, 8, 8, 3, 9, 4, 4, 8, 8, 12, 12, 8, 8, 14, 6, 4, 12, 8, 8, 11, 1, 4, 4, 8, 8, 4, 4, 8, 8, 2, 10, 12, 4, 12, 12, 8, 8, 2, 10, 12, 4, 14, 14, 12, 4, 7, 11, 10, 6, 8, 8, 11, 1, 4, 4, 8, 8, 4, 4, 8, 8, 10, 2, 12, 4, 4, 4, 8, 8, 6, 14, 4, 12, 2, 2, 4, 12

Offset

0,3

Links

Table of n, a(n) for n=0..91.

Example

6! = 720 decimal = 2D0 hexadecimal, so a(6) = 13.

Prog

(PARI) a(n) = {d = digits(n!, 16); k = #d; while (!d[k] && (k!=1), k--); d[k]; } \\ Michel Marcus, Sep 21 2016

Crossrefs

Cf. A000142, A136690, A136691, A136692, A136693, A136694, A136695, A136696, A008904, A136697, A136698, A136699, A136700, A136701.

Sequence in context: A021376 A243311 A093888 * A328910 A064165 A320573

Adjacent sequences: A136699 A136700 A136701 * A136703 A136704 A136705

Keyword

base,easy,nonn

Author

Carl R. White, Jan 16 2008

Status

approved