A156302 - cp's OEIS frontend

A156302 G.f.: A(x) = exp( Sum_{n>=1} sigma(n)^2*x^n/n ), a power series in x with integer coefficients.

n	a(n)
0	1
1	1
2	5
3	10
4	30
5	57
6	152
7	289
8	676
9	1304
10	2809
11	5335
12	10961
13	20487
14	40329
15	74476
16	141914
17	258094
18	479638
19	860025
20	1563716
21	2767982
22	4940567
23	8636563
24	15173805
25	26217392
26	45416811
27	77629455
28	132800937
29	224695510
30	380079521
31	637006921

[1, 1, 5, 10, 30, 57, 152, 289, 676, 1304, 2809, 5335, 10961, 20487, 40329, 74476, 141914, 258094, 479638, 860025, 1563716, 2767982, 4940567, 8636563, 15173805, 26217392, 45416811, 77629455, 132800937, 224695510, 380079521, 637006921]

cp's OEIS Frontend

A156302 G.f.: A(x) = exp( Sum_{n>=1} sigma(n)^2*x^n/n ), a power series in x with integer coefficients.

Table of values

List of values