A154760 Final digit of n!! (A006882).

1, 1, 2, 3, 8, 5, 8, 5, 4, 5, 0, 5, 0, 5, 0, 5, 0, 5, 0, 5, 0, 5, 0, 5, 0, 5, 0, 5, 0, 5, 0, 5, 0, 5, 0, 5, 0, 5, 0, 5, 0, 5, 0, 5, 0, 5, 0, 5, 0, 5, 0, 5, 0, 5, 0, 5, 0, 5, 0, 5, 0, 5, 0, 5, 0, 5, 0, 5, 0, 5, 0, 5, 0, 5, 0, 5, 0, 5, 0, 5, 0, 5, 0, 5, 0, 5, 0, 5, 0, 5, 0, 5, 0, 5, 0, 5, 0, 5, 0, 5, 0, 5, 0, 5, 0, 5, 0, 5, 0, 5, 0, 5, 0, 5, 0, 5, 0, 5, 0

Offset

0,3

Comments

For n>8: a(n)=0 if n is even, a(n)=5 if n is odd. - Dmitry Kamenetsky, Jan 17 2009

Links

Table of n, a(n) for n=0..118.

Example

The final digit of n! is 1,2,6,4,0,0,0,0,0,0,0,0,0,...

Mathematica

Join[Mod[Range[0, 8]!!, 10], PadRight[{}, 120, {5, 0}]] (* Harvey P. Dale, Dec 16 2023 *)

Crossrefs

Sequence in context: A265343 A347193 A268392 * A231817 A114340 A126102

Adjacent sequences: A154757 A154758 A154759 * A154761 A154762 A154763

Keyword

nonn,base

Author

Kousaka Hideaki (kousaka(AT)d6.dion.ne.jp), Jan 15 2009

Extensions

Offset corrected, more terms added by R. J. Mathar, Jan 18 2009

Status

approved