A168268 - cp's OEIS frontend

A168268 G.f.: exp( Sum_{n>=1} A007837(n)*x^n/n ), where A007837(n) = number of partitions of n-set with distinct block sizes.

n	a(n)
0	1
1	1
2	1
3	2
4	3
5	6
6	20
7	45
8	116
9	385
10	2224
11	6396
12	23708
13	88065
14	445784
15	3962502
16	14478825
17	64495508
18	309085415
19	1608099881
20	10856426344
21	142802148953
22	604464533847
23	3324499738872
24	17795211310951
25	112537384959231
26	718232376832560

[1, 1, 1, 2, 3, 6, 20, 45, 116, 385, 2224, 6396, 23708, 88065, 445784, 3962502, 14478825, 64495508, 309085415, 1608099881, 10856426344, 142802148953, 604464533847, 3324499738872, 17795211310951, 112537384959231, 718232376832560]

cp's OEIS Frontend

A168268 G.f.: exp( Sum_{n>=1} A007837(n)*x^n/n ), where A007837(n) = number of partitions of n-set with distinct block sizes.

Table of values

List of values