A357555 - cp's OEIS frontend

A357555 a(n) is the numerator of Sum_{d|n} (-1)^(d+1) / d^2.

n	a(n)
1	1
2	3
3	10
4	11
5	26
6	5
7	50
8	43
9	91
10	39
11	122
12	55
13	170
14	75
15	52
16	171
17	290
18	91
19	362
20	143
21	500
22	183
23	530
24	215
25	651
26	255
27	820
28	275
29	842
30	13
31	962
32	683
33	1220
34	435
35	52
36	1001
37	1370
38	543
39	1700
40	559
41	1682
42	125
43	1850
44	61
45	2366
46	795
47	2210
48	95
49	2451
50	1953
51	2900
52	935
53	2810
54	205
55	3172

[1, 3, 10, 11, 26, 5, 50, 43, 91, 39, 122, 55, 170, 75, 52, 171, 290, 91, 362, 143, 500, 183, 530, 215, 651, 255, 820, 275, 842, 13, 962, 683, 1220, 435, 52, 1001, 1370, 543, 1700, 559, 1682, 125, 1850, 61, 2366, 795, 2210, 95, 2451, 1953, 2900, 935, 2810, 205, 3172]

cp's OEIS Frontend

A357555 a(n) is the numerator of Sum_{d|n} (-1)^(d+1) / d^2.

Table of values

List of values