A121965 - cp's OEIS frontend

A121965 a(n) = (n-1)*a(n-1)-a(n-2), a(0)=0, a(1)=1.

n	a(n)
0	0
1	1
2	1
3	1
4	2
5	7
6	33
7	191
8	1304
9	10241
10	90865
11	898409
12	9791634
13	116601199
14	1506023953
15	20967734143
16	313009988192
17	4987192076929
18	84469255319601
19	1515459403675889
20	28709259414522290
21	572669728886769911
22	11997355047207645841
23	263369141309681438591

[0, 1, 1, 1, 2, 7, 33, 191, 1304, 10241, 90865, 898409, 9791634, 116601199, 1506023953, 20967734143, 313009988192, 4987192076929, 84469255319601, 1515459403675889, 28709259414522290, 572669728886769911, 11997355047207645841, 263369141309681438591]

cp's OEIS Frontend

A121965 a(n) = (n-1)*a(n-1)-a(n-2), a(0)=0, a(1)=1.

Table of values

List of values