A063729 - cp's OEIS frontend

A063729 Numbers k such that sigma(k)+1 is a square and sets a new record for such squares.

n	a(n)
1	2
2	7
3	8
4	14
5	32
6	54
7	60
8	72
9	84
10	120
11	196
12	252
13	312
14	378
15	512
16	540
17	860
18	990
19	1020
20	1350
21	1488
22	1560
23	2190
24	2232
25	3084
26	3144
27	3288
28	3444
29	3456
30	4620
31	7740
32	8520
33	9720
34	13080
35	13500
36	19230
37	19590
38	20088
39	21120
40	27090
41	29064
42	29232
43	31500
44	42336

[2, 7, 8, 14, 32, 54, 60, 72, 84, 120, 196, 252, 312, 378, 512, 540, 860, 990, 1020, 1350, 1488, 1560, 2190, 2232, 3084, 3144, 3288, 3444, 3456, 4620, 7740, 8520, 9720, 13080, 13500, 19230, 19590, 20088, 21120, 27090, 29064, 29232, 31500, 42336]

cp's OEIS Frontend

A063729 Numbers k such that sigma(k)+1 is a square and sets a new record for such squares.

Table of values

List of values