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A020484 Least prime p such that there exists a prime q with p-2n = q. 7
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 (list; graph; refs; listen; history; text; internal format)
OFFSET

0,1

LINKS

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

PROG

(Haskell)

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

-- Reinhard Zumkeller, Nov 29 2014

CROSSREFS

Cf. A000040, A010051, A020483.

Sequence in context: A065219 A013660 A257325 * A124203 A155085 A077665

Adjacent sequences:  A020481 A020482 A020483 * A020485 A020486 A020487

KEYWORD

nonn

AUTHOR

David W. Wilson

EXTENSIONS

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

STATUS

approved

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Last modified July 23 06:43 EDT 2017. Contains 289686 sequences.