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A093981
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Number of prime pairs below 10^n having a difference of 54.
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0
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OFFSET
| 1,5
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COMMENTS
| The primes must be consecutive, i.e., there must be no other primes between p and (p+54). [From Harvey P. Dale, Aug 08 2011]
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FORMULA
| Count prime pairs below 10^n having a difference of 54
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EXAMPLE
| a(6)=140 because there are 140 prime gaps of 54 below 10^6
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MATHEMATICA
| Table[Count[Partition[Prime[Range[PrimePi[10^i]]], 2, 1], _?(Last[#] - First[#] == 54&)], {i, 9}] (* From Harvey P. Dale, Aug 08 2011 *)
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CROSSREFS
| Sequence in context: A201388 A089666 A029850 * A055304 A002917 A119038
Adjacent sequences: A093978 A093979 A093980 * A093982 A093983 A093984
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KEYWORD
| nonn
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AUTHOR
| Enoch Haga (Enokh(AT)comcast.net), Apr 24 2004
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