A307351 - cp's OEIS frontend

A307351 a(n) = Sum_{i=1..n} Sum_{j=1..n} Sum_{k=1..n} Sum_{l=1..n} (-1)^(i+j+k+l) * (i+j+k+l)!/(4!i!j!*k!).

n	a(n)
0	0
1	1
2	36
3	6286
4	1056496
5	197741887
6	38987482590
7	7992252465604
8	1685955453442326
9	363605412277403725
10	79808698852014867735
11	17769930438868419048744
12	4003861131932651139989514
13	911215485942545343663605503
14	209160405405110598032066208338

[0, 1, 36, 6286, 1056496, 197741887, 38987482590, 7992252465604, 1685955453442326, 363605412277403725, 79808698852014867735, 17769930438868419048744, 4003861131932651139989514, 911215485942545343663605503, 209160405405110598032066208338]

cp's OEIS Frontend

A307351 a(n) = Sum_{i=1..n} Sum_{j=1..n} Sum_{k=1..n} Sum_{l=1..n} (-1)^(i+j+k+l) * (i+j+k+l)!/(4!i!j!*k!).

Table of values

List of values

cp's OEIS Frontend

A307351 a(n) = Sum_{i=1..n} Sum_{j=1..n} Sum_{k=1..n} Sum_{l=1..n} (-1)^(i+j+k+l) * (i+j+k+l)!/(4!*i!*j!*k!).

Table of values

List of values

A307351 a(n) = Sum_{i=1..n} Sum_{j=1..n} Sum_{k=1..n} Sum_{l=1..n} (-1)^(i+j+k+l) * (i+j+k+l)!/(4!i!j!*k!).