A357556 - cp's OEIS frontend

A357556 a(n) is the denominator of Sum_{d|n} (-1)^(d+1) / d^2.

n	a(n)
1	1
2	4
3	9
4	16
5	25
6	6
7	49
8	64
9	81
10	50
11	121
12	72
13	169
14	98
15	45
16	256
17	289
18	108
19	361
20	200
21	441
22	242
23	529
24	288
25	625
26	338
27	729
28	392
29	841
30	15
31	961
32	1024
33	1089
34	578
35	49
36	1296
37	1369
38	722
39	1521
40	800
41	1681
42	147
43	1849
44	88
45	2025
46	1058
47	2209
48	128
49	2401
50	2500
51	2601
52	1352
53	2809
54	243
55	3025

[1, 4, 9, 16, 25, 6, 49, 64, 81, 50, 121, 72, 169, 98, 45, 256, 289, 108, 361, 200, 441, 242, 529, 288, 625, 338, 729, 392, 841, 15, 961, 1024, 1089, 578, 49, 1296, 1369, 722, 1521, 800, 1681, 147, 1849, 88, 2025, 1058, 2209, 128, 2401, 2500, 2601, 1352, 2809, 243, 3025]

cp's OEIS Frontend

A357556 a(n) is the denominator of Sum_{d|n} (-1)^(d+1) / d^2.

Table of values

List of values