A374652 - cp's OEIS frontend

A374652 a(n) = Sum_{k=1..n+1} (-1)^(k - 1)(k + 1)(n - k + 1)!.

n	a(n)
1	-1
2	5
3	5
4	39
5	181
6	1159
7	8301
8	67919
9	621941
10	6308679
11	70223101
12	851165119
13	11160489861
14	157411458359
15	2376543620621
16	38242755444399
17	653435591570581
18	11815320900966439
19	225408497129888541
20	4524816801601368479
21	95339744251262894501
22	2103888092422797642519

[-1, 5, 5, 39, 181, 1159, 8301, 67919, 621941, 6308679, 70223101, 851165119, 11160489861, 157411458359, 2376543620621, 38242755444399, 653435591570581, 11815320900966439, 225408497129888541, 4524816801601368479, 95339744251262894501, 2103888092422797642519]

cp's OEIS Frontend

A374652 a(n) = Sum_{k=1..n+1} (-1)^(k - 1)(k + 1)(n - k + 1)!.

Table of values

List of values

cp's OEIS Frontend

A374652 a(n) = Sum_{k=1..n+1} (-1)^(k - 1)*(k + 1)*(n - k + 1)!.

Table of values

List of values

A374652 a(n) = Sum_{k=1..n+1} (-1)^(k - 1)(k + 1)(n - k + 1)!.