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A137859
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Number of primes between the n-th squared twin prime pair.
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4
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5, 6, 9, 11, 16, 20, 32, 30, 42, 42, 49, 58, 76, 77, 75, 82, 90, 91, 99, 107, 125, 151, 151, 145, 165, 189, 168, 189, 194, 211, 241, 244, 246, 259, 262, 290, 304, 300, 311, 314
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OFFSET
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1,1
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COMMENTS
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LINKS
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EXAMPLE
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a(4) = #{293,307,311,313,317,331,337,347,349,353,359} = 11.
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MATHEMATICA
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PrimePi[#[[2]]^2]-PrimePi[#[[1]]^2]&/@Select[Partition[ Prime[ Range[ 200]], 2, 1], #[[2]]-#[[1]]==2&] (* Harvey P. Dale, Nov 10 2017 *)
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CROSSREFS
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KEYWORD
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nonn
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AUTHOR
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STATUS
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approved
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