

A159708


Number a of different pairs of primes p,q (not consecutive) and such that p6,p or p,p+6 are consecutive primes q6,q or q,q+6 are consecutive primes and p+q=2*n


2



0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 0, 0, 2, 0, 0, 1, 1, 0, 0, 2, 0, 0, 2, 0, 0, 2, 0, 0, 2, 0, 0, 2, 0, 0, 2, 0, 0, 2, 0, 0, 1, 1, 0, 0, 2, 0, 0, 1, 0, 0, 0, 1, 0, 0, 2, 0, 0, 1, 0, 0, 0, 1, 0, 1, 2, 0, 2, 1, 0, 2, 1, 0, 2, 3, 0, 1, 4, 0, 0, 3
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OFFSET

1,38


COMMENTS

Conjecture:if n>4093 there is at least one pair p,q as define such that p+q=2*n


LINKS

Pierre CAMI, Table of n, a(n) for n=1..50000


EXAMPLE

23+47=70,23,29 and 47,53 consecutive primes so a(35)=1 29+41=70 but 41,47 are not consecutive primes gap 6
23+53=76,29+47=76,76=2*38, 23,29 and 47,53 consecutive primes with gap 6, so a(38)=2


CROSSREFS

Cf. A159700, A159704
Sequence in context: A281456 A284501 A281457 * A144625 A224772 A025442
Adjacent sequences: A159705 A159706 A159707 * A159709 A159710 A159711


KEYWORD

nonn


AUTHOR

Pierre CAMI, Apr 20 2009


STATUS

approved



