A155886 - cp's OEIS frontend

A155886 Least k such that 2^(2^k) = n (mod k).

n	a(n)
0	1
1	3
2	14
3	11
4	6
5	1941491
6	10
7	83
8	31
9	13
10	123
11	35
12	71
13	27
14	34913
15	241
16	18
17	8059
18	34
19	349
20	44
21	25
22	39
23	100867561
24	76
25	231
26	253
27	66203
28	57
29	227
30	139
31	45
32	184
33	37
34	111
35	97
36	55
37	41
38	103
39	1099
40	81
41	66791
42	53

[1, 3, 14, 11, 6, 1941491, 10, 83, 31, 13, 123, 35, 71, 27, 34913, 241, 18, 8059, 34, 349, 44, 25, 39, 100867561, 76, 231, 253, 66203, 57, 227, 139, 45, 184, 37, 111, 97, 55, 41, 103, 1099, 81, 66791, 53]

cp's OEIS Frontend

A155886 Least k such that 2^(2^k) = n (mod k).

Table of values

List of values