A057208 - cp's OEIS frontend

A057208 Primes of the form 8k+5 generated recursively: a(1)=5, a(n) = least prime p == 5 (mod 8) with p | 4+Q^2, where Q is the product of all previous terms in the sequence.

n	a(n)
1	5
2	29
3	1237
4	32171803229
5	829
6	405565189
7	14717
8	39405395843265000967254638989319923697097319108505264560061
9	282860648026692294583447078797184988636062145943222437
10	53
11	421
12	13
13	109
14	4133
15	6476791289161646286812333
16	461
17	34549
18	453690033695798389561735541

[5, 29, 1237, 32171803229, 829, 405565189, 14717, 39405395843265000967254638989319923697097319108505264560061, 282860648026692294583447078797184988636062145943222437, 53, 421, 13, 109, 4133, 6476791289161646286812333, 461, 34549, 453690033695798389561735541]

cp's OEIS Frontend

A057208 Primes of the form 8k+5 generated recursively: a(1)=5, a(n) = least prime p == 5 (mod 8) with p | 4+Q^2, where Q is the product of all previous terms in the sequence.

Table of values

List of values