A056199 - cp's OEIS frontend

A056199 a(n) = n * a(n-1) - Sum_{k=1..n-2} a(k) with a(1) = 0 and a(2) = 1.

n	a(n)
1	0
2	1
3	3
4	11
5	51
6	291
7	1971
8	15411
9	136371
10	1345971
11	14651571
12	174318771
13	2249992371
14	31309422771
15	467200878771
16	7441464174771
17	126003940206771
18	2260128508782771
19	42808495311726771
20	853775831370606771
21	17884089888607086771
22	392550999147809646771

[0, 1, 3, 11, 51, 291, 1971, 15411, 136371, 1345971, 14651571, 174318771, 2249992371, 31309422771, 467200878771, 7441464174771, 126003940206771, 2260128508782771, 42808495311726771, 853775831370606771, 17884089888607086771, 392550999147809646771]

cp's OEIS Frontend

A056199 a(n) = n * a(n-1) - Sum_{k=1..n-2} a(k) with a(1) = 0 and a(2) = 1.

Table of values

List of values