A201825 - cp's OEIS frontend

A201825 G.f.: exp( Sum_{n>=1} A119616(n)*x^n/n ) where A119616(n) = (sigma(n)^2 - sigma(n,2))/2.

n	a(n)
0	1
1	0
2	1
3	1
4	4
5	2
6	12
7	6
8	26
9	21
10	61
11	46
12	155
13	114
14	317
15	293
16	704
17	627
18	1539
19	1400
20	3149
21	3124
22	6469
23	6463
24	13341
25	13467
26	26271
27	27889
28	51970
29	55513
30	101961
31	110261
32	195586
33	217238
34	373391
35	418299
36	708816
37	800833
38	1323842
39	1521372
40	2461081
41	2846722
42	4543987

[1, 0, 1, 1, 4, 2, 12, 6, 26, 21, 61, 46, 155, 114, 317, 293, 704, 627, 1539, 1400, 3149, 3124, 6469, 6463, 13341, 13467, 26271, 27889, 51970, 55513, 101961, 110261, 195586, 217238, 373391, 418299, 708816, 800833, 1323842, 1521372, 2461081, 2846722, 4543987]

cp's OEIS Frontend

A201825 G.f.: exp( Sum_{n>=1} A119616(n)*x^n/n ) where A119616(n) = (sigma(n)^2 - sigma(n,2))/2.

Table of values

List of values