A198304 - cp's OEIS frontend

A198304 G.f.: exp( Sum_{n>=1} (x^n/n) / Product_{d|n} (1 - n*x^d/d) ).

n	a(n)
0	1
1	1
2	2
3	4
4	9
5	21
6	54
7	148
8	442
9	1433
10	5061
11	19394
12	80308
13	357241
14	1697870
15	8577240
16	45845235
17	258198133
18	1526631800
19	9445795717
20	60988643813
21	409933740177
22	2862338202947
23	20723903238290
24	155329193200741
25	1203428108558453
26	9624564394649845
27	79357873429159078

[1, 1, 2, 4, 9, 21, 54, 148, 442, 1433, 5061, 19394, 80308, 357241, 1697870, 8577240, 45845235, 258198133, 1526631800, 9445795717, 60988643813, 409933740177, 2862338202947, 20723903238290, 155329193200741, 1203428108558453, 9624564394649845, 79357873429159078]

cp's OEIS Frontend

A198304 G.f.: exp( Sum_{n>=1} (x^n/n) / Product_{d|n} (1 - n*x^d/d) ).

Table of values

List of values