A068020 - cp's OEIS frontend

A068020 a(n) = Z(S_m; sigma[1](n), sigma[2](n),..., sigma[m](n)) where Z(S_m; x_1,x_2,...,x_m) is the cycle index of the symmetric group S_m and sigma[k](n) is the sum of k-th powers of divisors of n; m=3.

n	a(n)
1	1
2	15
3	40
4	155
5	156
6	672
7	400
8	1395
9	1210
10	2520
11	1464
12	7280
13	2380
14	6336
15	6600
16	11811
17	5220
18	21030
19	7240
20	26880
21	16672
22	22752
23	12720
24	66960
25	20306
26	36792
27	33880
28	67040
29	25260
30	119592
31	30784
32	97155
33	60144
34	80136
35	64080
36	230966
37	52060
38	110880
39	97384

[1, 15, 40, 155, 156, 672, 400, 1395, 1210, 2520, 1464, 7280, 2380, 6336, 6600, 11811, 5220, 21030, 7240, 26880, 16672, 22752, 12720, 66960, 20306, 36792, 33880, 67040, 25260, 119592, 30784, 97155, 60144, 80136, 64080, 230966, 52060, 110880, 97384]

cp's OEIS Frontend

A068020 a(n) = Z(S_m; sigma[1](n), sigma[2](n),..., sigma[m](n)) where Z(S_m; x_1,x_2,...,x_m) is the cycle index of the symmetric group S_m and sigma[k](n) is the sum of k-th powers of divisors of n; m=3.

Table of values

List of values