A138939 - cp's OEIS frontend

A138939 Indices k such that A019327(k)=Phi[k](9) is prime, where Phi is a cyclotomic polynomial.

n	a(n)
1	6
2	12
3	18
4	20
5	30
6	36
7	54
8	66
9	118
10	138
11	152
12	182
13	232
14	264
15	336
16	340
17	380
18	414
19	446
20	492
21	540
22	624
23	720
24	762
25	1066
26	1094
27	1098
28	1170
29	1230
30	1254
31	1320
32	1428
33	1546
34	2018
35	2574
36	2724
37	2804
38	2920
39	3074
40	3316
41	3646
42	4124
43	4132
44	4186
45	4620
46	4802

[6, 12, 18, 20, 30, 36, 54, 66, 118, 138, 152, 182, 232, 264, 336, 340, 380, 414, 446, 492, 540, 624, 720, 762, 1066, 1094, 1098, 1170, 1230, 1254, 1320, 1428, 1546, 2018, 2574, 2724, 2804, 2920, 3074, 3316, 3646, 4124, 4132, 4186, 4620, 4802]

cp's OEIS Frontend

A138939 Indices k such that A019327(k)=Phi[k](9) is prime, where Phi is a cyclotomic polynomial.

Table of values

List of values