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Search: id:A113568
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| A113568 |
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Numbers n such that prime(n) +- n, prime(n) +- 2n, prime(n) +- 3n and prime(n) +- 4n are all primes. |
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1
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OFFSET
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1,1
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MATHEMATICA
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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, 17 106}]; p*t
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CROSSREFS
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Cf. A064403, A112530, A000001.
Sequence in context: A104441 A045871 A034639 this_sequence A115505 A126435 A011571
Adjacent sequences: A113565 A113566 A113567 this_sequence A113569 A113570 A113571
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KEYWORD
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bref,nonn
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AUTHOR
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Robert G. Wilson v (rgwv(AT)rgwv.com), Sep 20 2005
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