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A113567 Numbers n such that prime(n) +- n, prime(n) +- 2n and prime(n) +- 3n are all primes. 0
252420, 874650, 1413510, 2053380, 2298240, 2456160, 4640370, 7529340, 8708910, 11205390, 18734310, 22141980, 23680650, 26407920, 30866010, 31340400, 38515050, 43242780, 44584260, 58430400, 61172790, 62739180, 64449210 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

LINKS

Table of n, a(n) for n=1..23.

MATHEMATICA

t = {}; p = 2*3*5*7; Do[ If[ PrimeQ[Prime[p*n] - p*3n] && PrimeQ[Prime[p*n] - p*2n] && PrimeQ[Prime[p*n] - p*n] && PrimeQ[Prime[p*n] + p*n] && PrimeQ[Prime[p*n] + p*2n] && PrimeQ[Prime[p*n] + p*3n], AppendTo[t, n]], {n, 2194723}]; p*t

CROSSREFS

Cf. A064403, A112530.

Sequence in context: A183668 A235025 A237106 * A083628 A212843 A270267

Adjacent sequences:  A113564 A113565 A113566 * A113568 A113569 A113570

KEYWORD

nonn

AUTHOR

Robert G. Wilson v, Sep 20 2005

STATUS

approved

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Last modified October 16 01:20 EDT 2019. Contains 328038 sequences. (Running on oeis4.)