

A098042


Numbers p such that p = (prime(prime(n))+ prime(prime((n+1)))/2 is prime.


0



307, 593, 1459, 1511, 1609, 2399, 2447, 2579, 2903, 4409, 5953, 6317, 7151, 11083, 12491, 14753, 16067, 18199, 18223, 20929, 21787, 23893, 25667, 26317, 31051, 37139, 37573, 37871, 40283, 40471, 41201, 41479, 42013, 44537, 44741, 48409
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OFFSET

2,1


LINKS

Table of n, a(n) for n=2..37.


EXAMPLE

prime(prime(18)) = 283,prime(prime(19)) = 331. 614/2 = 307.


PROG

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


CROSSREFS

Sequence in context: A261289 A142255 A309101 * A125252 A308785 A142572
Adjacent sequences: A098039 A098040 A098041 * A098043 A098044 A098045


KEYWORD

easy,nonn


AUTHOR

Cino Hilliard, Sep 10 2004


STATUS

approved



