A198301 - cp's OEIS frontend

A198301 G.f.: exp( Sum_{n>=1} (x^n/n) * Sum_{d|n} d*sigma(n/d,d) ).

n	a(n)
0	1
1	1
2	3
3	5
4	12
5	18
6	42
7	62
8	131
9	206
10	398
11	610
12	1203
13	1810
14	3358
15	5260
16	9471
17	14518
18	26182
19	39906
20	70320
21	108849
22	187251
23	287525
24	497288
25	758860
26	1286936
27	1986352
28	3330677
29	5102712
30	8560107
31	13070327
32	21685731
33	33328561
34	54744685
35	83792111
36	137817745
37	210223967

[1, 1, 3, 5, 12, 18, 42, 62, 131, 206, 398, 610, 1203, 1810, 3358, 5260, 9471, 14518, 26182, 39906, 70320, 108849, 187251, 287525, 497288, 758860, 1286936, 1986352, 3330677, 5102712, 8560107, 13070327, 21685731, 33328561, 54744685, 83792111, 137817745, 210223967]

cp's OEIS Frontend

A198301 G.f.: exp( Sum_{n>=1} (x^n/n) * Sum_{d|n} d*sigma(n/d,d) ).

Table of values

List of values