A307975 - cp's OEIS frontend

A307975 G.f. A(x) satisfies: A(x) = x * exp(Sum_{k>=1} (A(x^k) + sigma(k)*x^k)/k).

n	a(n)
0	0
1	1
2	2
3	6
4	17
5	52
6	161
7	524
8	1739
9	5929
10	20562
11	72471
12	258596
13	932897
14	3395922
15	12459900
16	46028216
17	171056252
18	639072199
19	2398886256
20	9042816457
21	34217811625
22	129926976921
23	494892472911
24	1890469032715
25	7240573075556
26	27799085344845
27	106970043377619
28	412474047216418

[0, 1, 2, 6, 17, 52, 161, 524, 1739, 5929, 20562, 72471, 258596, 932897, 3395922, 12459900, 46028216, 171056252, 639072199, 2398886256, 9042816457, 34217811625, 129926976921, 494892472911, 1890469032715, 7240573075556, 27799085344845, 106970043377619, 412474047216418]

cp's OEIS Frontend

A307975 G.f. A(x) satisfies: A(x) = x * exp(Sum_{k>=1} (A(x^k) + sigma(k)*x^k)/k).

Table of values

List of values