A000932 - cp's OEIS frontend

A000932 a(n) = a(n-1) + n*a(n-2); a(0) = a(1) = 1.

n	a(n)
0	1
1	1
2	3
3	6
4	18
5	48
6	156
7	492
8	1740
9	6168
10	23568
11	91416
12	374232
13	1562640
14	6801888
15	30241488
16	139071696
17	653176992
18	3156467520
19	15566830368
20	78696180768
21	405599618496
22	2136915595392
23	11465706820800
24	62751681110208
25	349394351630208
26	1980938060495616

[1, 1, 3, 6, 18, 48, 156, 492, 1740, 6168, 23568, 91416, 374232, 1562640, 6801888, 30241488, 139071696, 653176992, 3156467520, 15566830368, 78696180768, 405599618496, 2136915595392, 11465706820800, 62751681110208, 349394351630208, 1980938060495616]

cp's OEIS Frontend

A000932 a(n) = a(n-1) + n*a(n-2); a(0) = a(1) = 1.

Table of values

List of values