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A105443 a(n) = the smallest prime p such that p+4 and q+4 are prime; q is the n-th prime after p. 3
3, 67, 3, 43, 3, 37, 7, 79, 3, 19, 3, 13, 19, 7, 13, 3, 7, 13, 3, 7, 79, 3, 43, 3, 37, 3, 79, 3, 19, 67, 13, 673, 7, 229, 3, 79, 13, 127, 7, 79, 3, 79, 7, 43, 3, 37, 3, 43, 97, 19, 163, 13, 127, 7, 43, 3, 37, 7, 97, 3, 19, 3, 13, 97, 7, 19, 3, 13, 19, 7, 13, 3, 7, 277, 3, 19, 37, 13 (list; graph; refs; listen; history; text; internal format)
OFFSET

2,1

LINKS

Table of n, a(n) for n=2..79.

EXAMPLE

a(2)=3 because 3+4 and 7+4 are primes.

CROSSREFS

Cf. A105439, A105444, A105445.

Sequence in context: A185053 A165655 A157576 * A065425 A096482 A139868

Adjacent sequences:  A105440 A105441 A105442 * A105444 A105445 A105446

KEYWORD

nonn

AUTHOR

Cino Hilliard, May 02 2005

EXTENSIONS

Edited by Don Reble, Jun 11 2007

STATUS

approved

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Last modified September 19 14:36 EDT 2020. Contains 337178 sequences. (Running on oeis4.)