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Search: id:A141592
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| A141592 |
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Numbers n such that n, n+210*1, n+210*2, n+210*3, n+210*4 are averages of pairs of twin primes. |
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| 1308498, 3042492, 3042702, 7445310, 20031102, 31572522, 44687988, 54266292
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OFFSET
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1,1
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EXAMPLE
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1308498 and 1308708, 1308918, 1309128, 1309338 are averages of twin primes,.
3042492 and 3042702, 3042912, 3043122, 3043332 are averages of twin primes.
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MATHEMATICA
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q=210; lst={}; Do[If[PrimeQ[n-1]&&PrimeQ[n+1]&&PrimeQ[n+q*1-1]&&PrimeQ[n+q*1+1]&&PrimeQ[n+q*2-1\ ]&&PrimeQ[n+q*2+1]&&PrimeQ[n+q*3-1]&&PrimeQ[n+q*3+1]&&PrimeQ[n+q*4-1]&&PrimeQ[n+\ q*4+1], AppendTo[lst, n]], {n, 10^8}]; lst
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CROSSREFS
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Sequence in context: A053081 A053084 A066702 this_sequence A116495 A023047 A157854
Adjacent sequences: A141589 A141590 A141591 this_sequence A141593 A141594 A141595
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KEYWORD
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nonn
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AUTHOR
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Vladimir Orlovsky (4vladimir(AT)gmail.com), Aug 20 2008
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EXTENSIONS
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Edited by N. J. A. Sloane (njas(AT)research.att.com), Aug 24 2008
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