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A087506 Primes in A087461. 0
5, 13, 71, 127, 163, 197, 227, 307, 317, 409, 523, 587, 593, 761, 857, 947, 1151, 1321, 1373, 1783, 1861, 1973, 2039, 2273, 2417, 2543, 3049, 3083, 3457, 3463, 3697, 3739, 4093, 4243, 4253, 4463, 4483, 4519, 4583, 4657, 4723, 4751, 5171, 5179, 5519, 5591 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Primes of the form (prime(k)+prime(2k))/2.

LINKS

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

MATHEMATICA

Select[Table[(Prime[n]+Prime[2n])/2, {n, 500}], PrimeQ] (* Harvey P. Dale, May 06 2013 *)

CROSSREFS

Cf. A087461.

Sequence in context: A149575 A156101 A093118 * A068487 A075063 A100209

Adjacent sequences:  A087503 A087504 A087505 * A087507 A087508 A087509

KEYWORD

nonn

AUTHOR

Ray Chandler, Sep 10 2003

STATUS

approved

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Last modified November 22 00:32 EST 2019. Contains 329383 sequences. (Running on oeis4.)