A138919 - cp's OEIS frontend

A138919 Indices k such that A020510(k)=Phi[k](-11) is prime, where Phi is a cyclotomic polynomial.

n	a(n)
1	5
2	7
3	18
4	20
5	21
6	30
7	34
8	36
9	38
10	52
11	54
12	60
13	90
14	104
15	117
16	123
17	146
18	159
19	179
20	182
21	229
22	278
23	388
24	405
25	410
26	439
27	552
28	557
29	735
30	806
31	807
32	1220
33	1272
34	1568
35	1688
36	1696
37	1710
38	1814
39	2136
40	2262
41	2288
42	2862
43	3679
44	3814
45	4058
46	4304
47	4480
48	5070
49	5136
50	5154

[5, 7, 18, 20, 21, 30, 34, 36, 38, 52, 54, 60, 90, 104, 117, 123, 146, 159, 179, 182, 229, 278, 388, 405, 410, 439, 552, 557, 735, 806, 807, 1220, 1272, 1568, 1688, 1696, 1710, 1814, 2136, 2262, 2288, 2862, 3679, 3814, 4058, 4304, 4480, 5070, 5136, 5154]

cp's OEIS Frontend

A138919 Indices k such that A020510(k)=Phi[k](-11) is prime, where Phi is a cyclotomic polynomial.

Table of values

List of values