A352805 a(n) = A296507(n+1)/6; numbers k such that 36*k^2 - 13 is prime.

1, 2, 3, 4, 5, 6, 9, 12, 14, 15, 16, 17, 19, 20, 23, 28, 31, 33, 34, 35, 36, 38, 40, 46, 49, 53, 55, 59, 60, 62, 63, 67, 69, 73, 74, 76, 80, 83, 84, 98, 100, 102, 103, 105, 106, 111, 113, 115, 119, 120, 121, 122, 123, 127, 128, 132, 134, 136, 142, 144, 145, 147

Offset: 1

Author

Jianing Song, Apr 04 2022

Keywords

• nonn
• easy

Comments

A296507 with common factor 6 removed.

Links

• Jianing Song, Table of n, a(n) for n = 1..10000

Crossrefs

Cf. A296507, A154648 ({3} union the resulting primes), A352804.

Programs

Mathematica

Select[Range[200], PrimeQ[36*#^2 - 13] &]

PARI

isA352805(n)=isprime(36*n^2-13)