A234693 - cp's OEIS frontend

A234693 Primes of the form n^2 + 1 such that (n - 1)^2 + 1 and (n + 1)^2 + 1 are semiprimes.

n	a(n)
1	17
2	101
3	28901
4	324901
5	608401
6	902501
7	2016401
8	5664401
9	7452901
10	14822501
11	16974401
12	18490001
13	34222501
14	40449601
15	41731601
16	46240001
17	48580901
18	50410001
19	52417601
20	76038401
21	92736901
22	103022501
23	111936401
24	121220101
25	124768901
26	139948901
27	151290001

[17, 101, 28901, 324901, 608401, 902501, 2016401, 5664401, 7452901, 14822501, 16974401, 18490001, 34222501, 40449601, 41731601, 46240001, 48580901, 50410001, 52417601, 76038401, 92736901, 103022501, 111936401, 121220101, 124768901, 139948901, 151290001]

cp's OEIS Frontend

A234693 Primes of the form n^2 + 1 such that (n - 1)^2 + 1 and (n + 1)^2 + 1 are semiprimes.

Table of values

List of values