A020484 Least prime p such that there exists a prime q with p-2n = q.

2, 5, 7, 11, 11, 13, 17, 17, 19, 23, 23, 29, 29, 29, 31, 37, 37, 37, 41, 41, 43, 47, 47, 53, 53, 53, 59, 59, 59, 61, 67, 67, 67, 71, 71, 73, 79, 79, 79, 83, 83, 89, 89, 89, 101, 97, 97, 97, 101, 101, 103, 107, 107, 109, 113, 113, 131, 127, 127, 131, 127, 127, 127, 131, 131, 137

Offset: 0

Author

David W. Wilson

Keywords

• nonn

Links

• Reinhard Zumkeller, Table of n, a(n) for n = 0..10000

Crossrefs

Cf. A000040, A010051, A020483.

Programs

Haskell

a020484 n = head [q | p <- a000040_list, let q = p + 2*n, a010051' q == 1]
-- Reinhard Zumkeller, Nov 29 2014

Extensions

Minor edits by N. J. A. Sloane, Jul 13 2010