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A113567
Numbers n such that prime(n) +- n, prime(n) +- 2n and prime(n) +- 3n are all primes.
1
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
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
Sequence in context: A183668 A235025 A237106 * A083628 A212843 A270267
KEYWORD
nonn
AUTHOR
Robert G. Wilson v, Sep 20 2005
STATUS
approved