A322664 - cp's OEIS frontend

A322664 a(n) = n^2 * Sum_{p^k|n} Sum_{j=1..k} 1/p^(2*j), where p are primes dividing n with multiplicity k.

n	a(n)
1	0
2	1
3	1
4	5
5	1
6	13
7	1
8	21
9	10
10	29
11	1
12	61
13	1
14	53
15	34
16	85
17	1
18	121
19	1
20	141
21	58
22	125
23	1
24	253
25	26
26	173
27	91
28	261
29	1
30	361
31	1
32	341
33	130
34	293
35	74
36	565
37	1
38	365
39	178
40	589
41	1
42	673
43	1
44	621
45	331
46	533
47	1
48	1021
49	50
50	729
51	298
52	861
53	1
54	1093
55	146
56	1093
57	370
58	845
59	1
60	1669
61	1
62	965

[0, 1, 1, 5, 1, 13, 1, 21, 10, 29, 1, 61, 1, 53, 34, 85, 1, 121, 1, 141, 58, 125, 1, 253, 26, 173, 91, 261, 1, 361, 1, 341, 130, 293, 74, 565, 1, 365, 178, 589, 1, 673, 1, 621, 331, 533, 1, 1021, 50, 729, 298, 861, 1, 1093, 146, 1093, 370, 845, 1, 1669, 1, 965]

cp's OEIS Frontend

A322664 a(n) = n^2 * Sum_{p^k|n} Sum_{j=1..k} 1/p^(2*j), where p are primes dividing n with multiplicity k.

Table of values

List of values