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A216441 a(n) = n! mod !n. 1
0, 0, 6, 32, 190, 1332, 10654, 95888, 958878, 10547660, 126571918, 1645434936, 23036089102, 345541336532, 5528661384510, 93987243536672, 1691770383660094, 32143637289541788, 642872745790835758, 13500327661607550920, 297007208555366120238, 6831165796773420765476 (list; graph; refs; listen; history; text; internal format)
OFFSET

2,3

COMMENTS

!n is a subfactorial number (A000166).

LINKS

Indranil Ghosh, Table of n, a(n) for n = 2..449

EXAMPLE

a(5) = 5! mod !5 = 120 mod 44 = 32. - Indranil Ghosh, Feb 15 2017

MAPLE

with(numtheory): f:=n->sum(n!*(((-1)^k)*1/k!), k=0..n):for n from 1 to 30 do:  x:=irem(n!, f(n)): printf(`%d, `, x):od:

MATHEMATICA

Table[Mod[n !, Subfactorial[n]], {n, 100} ]

CROSSREFS

Cf. A000166, A000142, A055596.

Sequence in context: A228959 A302734 A319228 * A108188 A020058 A146557

Adjacent sequences:  A216438 A216439 A216440 * A216442 A216443 A216444

KEYWORD

nonn

AUTHOR

Michel Lagneau, Sep 07 2012

STATUS

approved

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Last modified July 26 16:44 EDT 2021. Contains 346294 sequences. (Running on oeis4.)