A308238 - cp's OEIS frontend

A308238 Nonprimes k such that k^10 + k^9 + k^8 + k^7 + k^6 + k^5 + k^4 + k^3 + k^2 + k + 1 is prime.

n	a(n)
1	1
2	20
3	21
4	30
5	60
6	86
7	172
8	195
9	212
10	224
11	258
12	268
13	272
14	319
15	339
16	355
17	365
18	366
19	390
20	398
21	414
22	480
23	504
24	534
25	539
26	543
27	567
28	592
29	626
30	654
31	735
32	756
33	766
34	770
35	778
36	806
37	812
38	874
39	943
40	973
41	1003
42	1036
43	1040
44	1065
45	1194
46	1210
47	1239
48	1243
49	1264
50	1309
51	1311

[1, 20, 21, 30, 60, 86, 172, 195, 212, 224, 258, 268, 272, 319, 339, 355, 365, 366, 390, 398, 414, 480, 504, 534, 539, 543, 567, 592, 626, 654, 735, 756, 766, 770, 778, 806, 812, 874, 943, 973, 1003, 1036, 1040, 1065, 1194, 1210, 1239, 1243, 1264, 1309, 1311]

cp's OEIS Frontend

A308238 Nonprimes k such that k^10 + k^9 + k^8 + k^7 + k^6 + k^5 + k^4 + k^3 + k^2 + k + 1 is prime.

Table of values

List of values