A159308 - cp's OEIS frontend

A159308 G.f.: A(x) = exp( Sum_{n>=1} (1 + sigma(n)x)^n x^n/n ).

n	a(n)
0	1
1	1
2	2
3	5
4	14
5	40
6	154
7	631
8	2246
9	10476
10	71232
11	383220
12	1553841
13	8223567
14	58756725
15	338290401
16	1754330940
17	11744499990
18	103864469131
19	1220564280222
20	17394859369497
21	214311637862464
22	1891506713163679
23	10894997683415647

[1, 1, 2, 5, 14, 40, 154, 631, 2246, 10476, 71232, 383220, 1553841, 8223567, 58756725, 338290401, 1754330940, 11744499990, 103864469131, 1220564280222, 17394859369497, 214311637862464, 1891506713163679, 10894997683415647]

cp's OEIS Frontend

A159308 G.f.: A(x) = exp( Sum_{n>=1} (1 + sigma(n)x)^n x^n/n ).

Table of values

List of values

cp's OEIS Frontend

A159308 G.f.: A(x) = exp( Sum_{n>=1} (1 + sigma(n)*x)^n * x^n/n ).

Table of values

List of values

A159308 G.f.: A(x) = exp( Sum_{n>=1} (1 + sigma(n)x)^n x^n/n ).