A203321 - cp's OEIS frontend

A203321 L.g.f.: Sum_{n>=1} a(n)x^n/n = Sum_{n>=1} x^n/n exp( Sum_{k>=1} sigma(nk)x^(n*k)/k ).

n	a(n)
1	1
2	3
3	7
4	19
5	26
6	75
7	78
8	211
9	241
10	518
11	463
12	1447
13	1002
14	2558
15	2612
16	5715
17	3928
18	11901
19	7316
20	21574
21	17031
22	35159
23	23047
24	80575
25	40951
26	108488
27	86911
28	206638
29	107823
30	370220
31	173725
32	570803
33	372181
34	816496
35	451883
36	1723741
37	665150
38	2048982
39	1404150
40	3705366
41	1530859
42	5892479

[1, 3, 7, 19, 26, 75, 78, 211, 241, 518, 463, 1447, 1002, 2558, 2612, 5715, 3928, 11901, 7316, 21574, 17031, 35159, 23047, 80575, 40951, 108488, 86911, 206638, 107823, 370220, 173725, 570803, 372181, 816496, 451883, 1723741, 665150, 2048982, 1404150, 3705366, 1530859, 5892479]

cp's OEIS Frontend

A203321 L.g.f.: Sum_{n>=1} a(n)x^n/n = Sum_{n>=1} x^n/n exp( Sum_{k>=1} sigma(nk)x^(n*k)/k ).

Table of values

List of values

cp's OEIS Frontend

A203321 L.g.f.: Sum_{n>=1} a(n)*x^n/n = Sum_{n>=1} x^n/n * exp( Sum_{k>=1} sigma(n*k)*x^(n*k)/k ).

Table of values

List of values

A203321 L.g.f.: Sum_{n>=1} a(n)x^n/n = Sum_{n>=1} x^n/n exp( Sum_{k>=1} sigma(nk)x^(n*k)/k ).