A236068 - cp's OEIS frontend

A236068 Primes p such that f(f(p)) is prime, where f(x) = x^2 + 1.

n	a(n)
1	3
2	5
3	13
4	43
5	47
6	127
7	263
8	277
9	293
10	337
11	347
12	397
13	443
14	467
15	487
16	503
17	577
18	593
19	607
20	673
21	727
22	733
23	773
24	857
25	887
26	907
27	1153
28	1427
29	1487
30	1567
31	1583
32	1637
33	1777
34	2003
35	2213
36	2243
37	2477
38	2503
39	2557
40	2633
41	2687
42	2777

[3, 5, 13, 43, 47, 127, 263, 277, 293, 337, 347, 397, 443, 467, 487, 503, 577, 593, 607, 673, 727, 733, 773, 857, 887, 907, 1153, 1427, 1487, 1567, 1583, 1637, 1777, 2003, 2213, 2243, 2477, 2503, 2557, 2633, 2687, 2777]

cp's OEIS Frontend

A236068 Primes p such that f(f(p)) is prime, where f(x) = x^2 + 1.

Table of values

List of values