A307976 - cp's OEIS frontend

A307976 G.f. A(x) satisfies: A(x) = x * exp(Sum_{k>=1} (A(x^k) + sigma_2(k)*x^k)/k).

n	a(n)
0	0
1	1
2	2
3	7
4	22
5	73
6	242
7	838
8	2951
9	10661
10	39169
11	146231
12	552791
13	2112791
14	8149184
15	31683277
16	124030331
17	488484081
18	1934137711
19	7694617999
20	30742092365
21	123294683460
22	496206766654
23	2003331980722
24	8111420525097
25	32929963668470
26	134012337268578
27	546609050991988
28	2234166616090803

[0, 1, 2, 7, 22, 73, 242, 838, 2951, 10661, 39169, 146231, 552791, 2112791, 8149184, 31683277, 124030331, 488484081, 1934137711, 7694617999, 30742092365, 123294683460, 496206766654, 2003331980722, 8111420525097, 32929963668470, 134012337268578, 546609050991988, 2234166616090803]

cp's OEIS Frontend

A307976 G.f. A(x) satisfies: A(x) = x * exp(Sum_{k>=1} (A(x^k) + sigma_2(k)*x^k)/k).

Table of values

List of values