OFFSET
1,2
COMMENTS
Apparently a duplicate of A090209. - R. J. Mathar, Mar 06 2017
LINKS
FORMULA
a(n) = m!^n Sum_{p=1..n*m} (Choose(p,m)^n/p!) Sum_{k=0..n*m-p} (-1)^k/k! with m=5.
MATHEMATICA
Table[(5 !^n)*Sum[Binomial[p, 5]^n/p ! * Sum[(-1)^k/k !, {k, 0, 5n-p}], {p, 1, 5n}], {n, 1, 11}] (* Indranil Ghosh, Mar 04 2017 *)
PROG
(PARI) a(n) = (5!^n)*sum(p=1, 5*n, binomial(p, 5)^n/p! * sum(k=0, 5*n-p, (-1)^k/k!)); \\ Indranil Ghosh, Mar 04 2017
CROSSREFS
KEYWORD
nonn
AUTHOR
Marko Riedel, Mar 01 2017
EXTENSIONS
If it is proved that A283154 and A090209 are the same, then the entries should be merged and A283154 recycled. - N. J. A. Sloane, Mar 06 2017
STATUS
approved