A233929 - cp's OEIS frontend

A233929 Smallest x such that sigma(x) == n-1 (mod n).

n	a(n)
1	1
2	1
3	7
4	2
5	3
6	2401
7	5
8	4
9	7
10	18
11	21
12	9604
13	6
14	9
15	13
16	8
17	44
18	21609
19	10
20	18
21	19
22	289
23	36
24	9604
25	14
26	162
27	57
28	72
29	12
30	2614689
31	29
32	16
33	21
34	625
35	63
36	38416
37	22
38	4608
39	37
40	18
41	27
42	21609
43	20
44	289
45	43
46	36
47	50
48	38416
49	33
50	196
51	111
52	162
53	157
54	28561
55	34
56	1296
57	28
58	49

[1, 1, 7, 2, 3, 2401, 5, 4, 7, 18, 21, 9604, 6, 9, 13, 8, 44, 21609, 10, 18, 19, 289, 36, 9604, 14, 162, 57, 72, 12, 2614689, 29, 16, 21, 625, 63, 38416, 22, 4608, 37, 18, 27, 21609, 20, 289, 43, 36, 50, 38416, 33, 196, 111, 162, 157, 28561, 34, 1296, 28, 49]

cp's OEIS Frontend

A233929 Smallest x such that sigma(x) == n-1 (mod n).

Table of values

List of values