A250027 - cp's OEIS frontend

A250027 Primes p such that f(p) and f(f(p)) are primes, where f(x) = x^2+3*x+1.

n	a(n)
1	3
2	19
3	29
4	59
5	113
6	373
7	379
8	419
9	449
10	593
11	643
12	929
13	983
14	1063
15	1423
16	2053
17	2069
18	3169
19	3593
20	3943
21	4159
22	4493
23	5153
24	6163
25	6659
26	6689
27	6869
28	6949
29	7583
30	8963
31	9629
32	10099
33	10103
34	12413
35	13963
36	14303
37	14639
38	15359
39	15649
40	16703
41	17099
42	18523
43	18869

[3, 19, 29, 59, 113, 373, 379, 419, 449, 593, 643, 929, 983, 1063, 1423, 2053, 2069, 3169, 3593, 3943, 4159, 4493, 5153, 6163, 6659, 6689, 6869, 6949, 7583, 8963, 9629, 10099, 10103, 12413, 13963, 14303, 14639, 15359, 15649, 16703, 17099, 18523, 18869]

cp's OEIS Frontend

A250027 Primes p such that f(p) and f(f(p)) are primes, where f(x) = x^2+3*x+1.

Table of values

List of values