A344347 - cp's OEIS frontend

A344347 Numbers k such that sigma(k)^2 is divisible by k-1.

n	a(n)
1	2
2	3
3	5
4	10
5	33
6	55
7	82
8	129
9	136
10	145
11	261
12	351
13	385
14	406
15	442
16	513
17	649
18	897
19	1090
20	2241
21	4726
22	5185
23	8650
24	13601
25	17101
26	17641
27	18241
28	26625
29	26937
30	29697
31	29953
32	32896
33	34561
34	35841
35	38417
36	44955
37	46081
38	46593
39	51985
40	63505
41	65703
42	66249
43	84376
44	93313
45	97903

[2, 3, 5, 10, 33, 55, 82, 129, 136, 145, 261, 351, 385, 406, 442, 513, 649, 897, 1090, 2241, 4726, 5185, 8650, 13601, 17101, 17641, 18241, 26625, 26937, 29697, 29953, 32896, 34561, 35841, 38417, 44955, 46081, 46593, 51985, 63505, 65703, 66249, 84376, 93313, 97903]

cp's OEIS Frontend

A344347 Numbers k such that sigma(k)^2 is divisible by k-1.

Table of values

List of values