A303608 - cp's OEIS frontend

A303608 Repunit pseudoprimes: composite numbers k such that (10^k - 1)/9 == 1 (mod k).

n	a(n)
1	10
2	55
3	91
4	259
5	370
6	385
7	451
8	481
9	505
10	703
11	715
12	1045
13	1105
14	1729
15	2035
16	2465
17	2821
18	2981
19	3367
20	4141
21	4187
22	5005
23	5461
24	6533
25	6541
26	6565
27	6601
28	7471
29	7777
30	8149
31	8401
32	8695
33	8905
34	8911
35	10001
36	10585
37	11111
38	12403
39	13366
40	13981
41	14245
42	14645
43	14701
44	14911
45	15211
46	15841
47	18685

[10, 55, 91, 259, 370, 385, 451, 481, 505, 703, 715, 1045, 1105, 1729, 2035, 2465, 2821, 2981, 3367, 4141, 4187, 5005, 5461, 6533, 6541, 6565, 6601, 7471, 7777, 8149, 8401, 8695, 8905, 8911, 10001, 10585, 11111, 12403, 13366, 13981, 14245, 14645, 14701, 14911, 15211, 15841, 18685]

cp's OEIS Frontend

A303608 Repunit pseudoprimes: composite numbers k such that (10^k - 1)/9 == 1 (mod k).

Table of values

List of values