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A174244
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Least of 4 consecutive integers such that there product +-5 are primes.
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1
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1, 11, 31, 61, 116, 131, 321, 336, 906, 1081, 1101, 1216, 1601, 1821, 2081, 2106, 2356, 2491, 3051, 3101, 3281, 3286, 3496, 3736, 4576, 4716, 4861, 4876, 4886, 4981, 5066, 5096, 5301, 5881, 6066, 6121, 6401, 6761, 6916, 7061, 7446, 7556, 8021, 8041, 8056
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OFFSET
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1,2
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COMMENTS
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1*2*3*4=24+-5 -> primes,..
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LINKS
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Table of n, a(n) for n=1..45.
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MATHEMATICA
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f1[n_]:=PrimeQ[n-5]&&PrimeQ[n+5]; f2[n_]:=n*(n+1)*(n+2)*(n+3); lst={}; Do[If[f1[f2[n]], AppendTo[lst, n]], {n, 8!}]; lst
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CROSSREFS
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Cf. A014574, A174242, A174243
Sequence in context: A125239 A062786 A090562 * A136061 A090233 A139836
Adjacent sequences: A174241 A174242 A174243 * A174245 A174246 A174247
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KEYWORD
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nonn
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AUTHOR
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Vladimir Joseph Stephan Orlovsky, Mar 13 2010
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STATUS
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approved
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