A088572 Numbers n such that (2n+1)^2 - 2 is prime.

1, 2, 3, 4, 6, 7, 9, 10, 13, 14, 16, 17, 18, 21, 23, 24, 27, 30, 31, 34, 35, 37, 38, 44, 46, 51, 53, 58, 59, 60, 63, 65, 67, 69, 72, 77, 80, 84, 86, 88, 91, 95, 102, 105, 108, 111, 115, 116, 118, 119, 123, 126, 128, 129, 132, 133, 136, 139, 142, 146, 149, 150, 151, 154, 156, 157

Offset: 1

Author

Herman H. Rosenfeld (herm3(AT)pacbell.net), Nov 17 2003

Keywords

• nonn

Links

• Alois P. Heinz, Table of n, a(n) for n = 1..10000

Crossrefs

Cf. A028870, A073577.

Programs

Maple

q:= n-> isprime((2*n+1)^2-2):
select(q, [$0..157])[];  # Alois P. Heinz, Nov 13 2024

PARI

is(n)=isprime((2*n+1)^2-2) \\ Charles R Greathouse IV, Jun 12 2017