A087277 - cp's OEIS frontend

A087277 Numbers k such that the three second-degree cyclotomic polynomials x^2 + 1, x^2 - x + 1 and x^2 + x + 1 are simultaneously prime when evaluated at x=k.

n	a(n)
1	2
2	6
3	90
4	960
5	1974
6	2430
7	2730
8	2736
9	6006
10	6096
11	6306
12	7014
13	11934
14	14190
15	18276
16	18486
17	21204
18	24906
19	24984
20	25200
21	27210
22	35700
23	38556
24	39306
25	40860
26	44694
27	45654
28	47124
29	49524
30	51246
31	53220
32	56700
33	58176
34	63330
35	63960
36	72996
37	76650
38	80394
39	85560

[2, 6, 90, 960, 1974, 2430, 2730, 2736, 6006, 6096, 6306, 7014, 11934, 14190, 18276, 18486, 21204, 24906, 24984, 25200, 27210, 35700, 38556, 39306, 40860, 44694, 45654, 47124, 49524, 51246, 53220, 56700, 58176, 63330, 63960, 72996, 76650, 80394, 85560]

cp's OEIS Frontend

A087277 Numbers k such that the three second-degree cyclotomic polynomials x^2 + 1, x^2 - x + 1 and x^2 + x + 1 are simultaneously prime when evaluated at x=k.

Table of values

List of values