

A098031


Primes p such that p = (prime(n)+ prime(n+4))/2.


0



11, 13, 17, 103, 107, 151, 179, 251, 409, 421, 491, 619, 701, 709, 739, 941, 1009, 1051, 1069, 1459, 1487, 1499, 1571, 1759, 1789, 1873, 2281, 2441, 2659, 2671, 2741, 2749, 2789, 2819, 2861, 3011, 3019, 3331, 3389, 3463, 3931, 4001, 4111, 4177, 4229, 4231
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OFFSET

1,1


COMMENTS

The union of sequences A179208, A118467, and A126238.  Irina Gerasimova, Jul 07 2013


LINKS

Table of n, a(n) for n=1..46.


EXAMPLE

prime(3)=5,prime(3+4)=17. (5+17)/2 = 11.


PROG

(PARI) f(n, m) = for(x=1, n, y=prime(x)+prime(x+m); if(y%2==0 & isprime(y\2), print1(y\2", ")))


CROSSREFS

Sequence in context: A019371 A068335 A087776 * A179208 A098423 A178339
Adjacent sequences: A098028 A098029 A098030 * A098032 A098033 A098034


KEYWORD

easy,nonn


AUTHOR

Cino Hilliard, Sep 10 2004


STATUS

approved



