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 A123083 Prime quartets of form k, k+6, k+12, k+18. 1

%I

%S 5,11,17,23,11,17,23,29,41,47,53,59,61,67,73,79,251,257,263,269,601,

%T 607,613,619,641,647,653,659,1091,1097,1103,1109,1481,1487,1493,1499,

%U 1601,1607,1613,1619,1741,1747,1753,1759,1861,1867,1873,1879,2371,2377,2383

%N Prime quartets of form k, k+6, k+12, k+18.

%p i:=1:for k from 1 to 5000 do if isprime(k) and isprime(k+6)and isprime(k+12)and isprime(k+18) then a[i]:=k:a[i+1]:=k+6:a[i+2]:=k+12:a[i+3]:=k+18:i:=i+4 fi od: seq(a[n],n=1..i-1);

%Y Cf. A001097.

%K nonn

%O 1,1

%A _Miklos Kristof_, Sep 27 2006

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Last modified December 6 04:52 EST 2021. Contains 349562 sequences. (Running on oeis4.)