A092170 - cp's OEIS frontend

A092170 Sum of squares of alternating factorials : n!^2 - (n-1)!^2 + (n-2)!^2 - ... 1!^2.

n	a(n)
1	1
2	3
3	33
4	543
5	13857
6	504543
7	24897057
8	1600805343
9	130081089057
10	13038108350943
11	1580312813889057
12	227862219988670943
13	38547925823643969057
14	7561506530728353470943
15	1702450746193471070529057

[1, 3, 33, 543, 13857, 504543, 24897057, 1600805343, 130081089057, 13038108350943, 1580312813889057, 227862219988670943, 38547925823643969057, 7561506530728353470943, 1702450746193471070529057]

cp's OEIS Frontend

A092170 Sum of squares of alternating factorials : n!^2 - (n-1)!^2 + (n-2)!^2 - ... 1!^2.

Table of values

List of values