A110149 - cp's OEIS frontend

A110149 a(0) = 1, a(1) = 3; for n>1, a(n) = n*a(n-1) + (-1)^n.

n	a(n)
0	1
1	3
2	7
3	20
4	81
5	404
6	2425
7	16974
8	135793
9	1222136
10	12221361
11	134434970
12	1613219641
13	20971855332
14	293605974649
15	4404089619734
16	70465433915745
17	1197912376567664
18	21562422778217953
19	409686032786141106
20	8193720655722822121
21	172068133770179264540

[1, 3, 7, 20, 81, 404, 2425, 16974, 135793, 1222136, 12221361, 134434970, 1613219641, 20971855332, 293605974649, 4404089619734, 70465433915745, 1197912376567664, 21562422778217953, 409686032786141106, 8193720655722822121, 172068133770179264540]

cp's OEIS Frontend

A110149 a(0) = 1, a(1) = 3; for n>1, a(n) = n*a(n-1) + (-1)^n.

Table of values

List of values