A017668 - cp's OEIS frontend

A017668 Denominator of sum of -2nd powers of divisors of n.

n	a(n)
1	1
2	4
3	9
4	16
5	25
6	18
7	49
8	64
9	81
10	10
11	121
12	24
13	169
14	98
15	45
16	256
17	289
18	324
19	361
20	200
21	441
22	242
23	529
24	288
25	625
26	338
27	729
28	56
29	841
30	9
31	961
32	1024
33	1089
34	578
35	49
36	432
37	1369
38	722
39	1521
40	160
41	1681
42	441
43	1849
44	968
45	2025
46	1058
47	2209
48	1152
49	2401
50	500
51	2601
52	1352
53	2809

[1, 4, 9, 16, 25, 18, 49, 64, 81, 10, 121, 24, 169, 98, 45, 256, 289, 324, 361, 200, 441, 242, 529, 288, 625, 338, 729, 56, 841, 9, 961, 1024, 1089, 578, 49, 432, 1369, 722, 1521, 160, 1681, 441, 1849, 968, 2025, 1058, 2209, 1152, 2401, 500, 2601, 1352, 2809]

cp's OEIS Frontend

A017668 Denominator of sum of -2nd powers of divisors of n.

Table of values

List of values