A308327 - cp's OEIS frontend

A308327 a(n) = (1/n!) * Sum_{i_1=1..n} Sum_{i_2=1..n} ... Sum_{i_n=1..n} (-1)^(i_1 + i_2 + ... + i_n) * multinomial(i_1 + i_2 + ... + i_n; i_1, i_2, ..., i_n).

n	a(n)
0	1
1	-1
2	1
3	-120
4	1056496
5	-2063348839223
6	1457689055077930674637
7	-569779896381467292745562607320194
8	174622933743914766946635359968704455433117668396
9	-56466564044341292662007179162722871704054012257606338926938133618

[1, -1, 1, -120, 1056496, -2063348839223, 1457689055077930674637, -569779896381467292745562607320194, 174622933743914766946635359968704455433117668396, -56466564044341292662007179162722871704054012257606338926938133618]

cp's OEIS Frontend

A308327 a(n) = (1/n!) * Sum_{i_1=1..n} Sum_{i_2=1..n} ... Sum_{i_n=1..n} (-1)^(i_1 + i_2 + ... + i_n) * multinomial(i_1 + i_2 + ... + i_n; i_1, i_2, ..., i_n).

Table of values

List of values