A307324 - cp's OEIS frontend

A307324 a(n) = Sum_{i=0..n} Sum_{j=0..n} Sum_{k=0..n} Sum_{l=0..n} (-1)^(i+j+k+l) * (i+j+k+l)!/(i!j!k!*l!).

n	a(n)
0	1
1	9
2	997
3	148041
4	25413205
5	4744544613
6	935728207597
7	191813392024137
8	40462946725744501
9	8726529512888314245
10	1915408781755211655133
11	426478330303800465141669
12	96092667172064808771832957
13	21869171662479233922632691261

[1, 9, 997, 148041, 25413205, 4744544613, 935728207597, 191813392024137, 40462946725744501, 8726529512888314245, 1915408781755211655133, 426478330303800465141669, 96092667172064808771832957, 21869171662479233922632691261]

cp's OEIS Frontend

A307324 a(n) = Sum_{i=0..n} Sum_{j=0..n} Sum_{k=0..n} Sum_{l=0..n} (-1)^(i+j+k+l) * (i+j+k+l)!/(i!j!k!*l!).

Table of values

List of values

cp's OEIS Frontend

A307324 a(n) = Sum_{i=0..n} Sum_{j=0..n} Sum_{k=0..n} Sum_{l=0..n} (-1)^(i+j+k+l) * (i+j+k+l)!/(i!*j!*k!*l!).

Table of values

List of values

A307324 a(n) = Sum_{i=0..n} Sum_{j=0..n} Sum_{k=0..n} Sum_{l=0..n} (-1)^(i+j+k+l) * (i+j+k+l)!/(i!j!k!*l!).