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A079305
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First near twin primes of order 6n: smallest p such that p, p+2, p+6n and p+6n+2 are primes.
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0
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5, 5, 11, 5, 11, 5, 17, 11, 5, 11, 5, 29, 29, 17, 11, 5, 5, 29, 197, 17, 11, 5, 11, 5, 29, 41, 17, 11, 5, 11, 5, 5, 29, 107, 17, 11, 5, 11, 5, 29, 101, 17, 11, 5, 11, 5, 29, 59, 17, 11, 5, 107, 29, 107, 17, 11, 5, 71, 107, 59, 461, 59, 41, 137, 29, 431, 17, 11, 5, 11, 5, 29, 179
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OFFSET
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1,1
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LINKS
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MATHEMATICA
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a[n_] := For[p=5, True, p+=6, If[PrimeQ[p]&&PrimeQ[p+2]&&PrimeQ[p+6n]&&PrimeQ[p+6n+2], Return[p]]]
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PROG
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(PARI) neartp(n) = { forstep(d=6, n, 6, forprime(x=3, n, if(isprime(x+2) & isprime(x+d) & isprime(x+d+2), print1(x", "); break ) ) ) }
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CROSSREFS
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KEYWORD
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easy,nonn
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AUTHOR
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EXTENSIONS
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STATUS
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approved
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