A128361 - cp's OEIS frontend

A128361 a(n) = least k such that the remainder when 21^k is divided by k is n.

n	a(n)
1	2
2	19
3	6
4	17
5	218
6	15
7	14
8	13
9	12
10	11
11	86
12	9249
13	214
14	133
15	69
16	4084085
17	106
18	39
19	422
20	581831
21	23
22	5053
23	38
24	9237
25	26
26	775
27	46
28	1253
29	206
30	51
31	82
32	671
33	34
34	617741981
35	58
36	45
37	202
38	289
39	87
40	6401
41	185
42	217
43	341
44	3485351
45	66
46	2718013
47	394
48	111
49	56
50	8064317
51	75

[2, 19, 6, 17, 218, 15, 14, 13, 12, 11, 86, 9249, 214, 133, 69, 4084085, 106, 39, 422, 581831, 23, 5053, 38, 9237, 26, 775, 46, 1253, 206, 51, 82, 671, 34, 617741981, 58, 45, 202, 289, 87, 6401, 185, 217, 341, 3485351, 66, 2718013, 394, 111, 56, 8064317, 75]

cp's OEIS Frontend

A128361 a(n) = least k such that the remainder when 21^k is divided by k is n.

Table of values

List of values