A001040 - cp's OEIS frontend

A001040 a(n+1) = n*a(n) + a(n-1) with a(0)=0, a(1)=1.

n	a(n)
0	0
1	1
2	1
3	3
4	10
5	43
6	225
7	1393
8	9976
9	81201
10	740785
11	7489051
12	83120346
13	1004933203
14	13147251985
15	185066460993
16	2789144166880
17	44811373131073
18	764582487395121
19	13807296146243251
20	263103209266016890
21	5275871481466581051
22	111056404320064218961
23	2448516766522879398193

[0, 1, 1, 3, 10, 43, 225, 1393, 9976, 81201, 740785, 7489051, 83120346, 1004933203, 13147251985, 185066460993, 2789144166880, 44811373131073, 764582487395121, 13807296146243251, 263103209266016890, 5275871481466581051, 111056404320064218961, 2448516766522879398193]

cp's OEIS Frontend

A001040 a(n+1) = n*a(n) + a(n-1) with a(0)=0, a(1)=1.

Table of values

List of values