A205490 - cp's OEIS frontend

A205490 G.f.: exp( Sum_{n>=1} (x^n/n) / Product_{d|n} (1 - d*x^d)^n ).

n	a(n)
0	1
1	1
2	2
3	4
4	10
5	22
6	57
7	134
8	331
9	797
10	1995
11	4879
12	12367
13	31056
14	79315
15	202370
16	521575
17	1339934
18	3456778
19	8885907
20	22848211
21	58576714
22	150117209
23	384135566
24	983789032
25	2522109065
26	6485104365
27	16736092434
28	43408268497
29	113201300205
30	296975753940
31	783578962587

[1, 1, 2, 4, 10, 22, 57, 134, 331, 797, 1995, 4879, 12367, 31056, 79315, 202370, 521575, 1339934, 3456778, 8885907, 22848211, 58576714, 150117209, 384135566, 983789032, 2522109065, 6485104365, 16736092434, 43408268497, 113201300205, 296975753940, 783578962587]

cp's OEIS Frontend

A205490 G.f.: exp( Sum_{n>=1} (x^n/n) / Product_{d|n} (1 - d*x^d)^n ).

Table of values

List of values