A113567 Numbers n such that prime(n) +- n, prime(n) +- 2n and prime(n) +- 3n are all primes.

252420, 874650, 1413510, 2053380, 2298240, 2456160, 4640370, 7529340, 8708910, 11205390, 18734310, 22141980, 23680650, 26407920, 30866010, 31340400, 38515050, 43242780, 44584260, 58430400, 61172790, 62739180, 64449210

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