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Search: id:A137859
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| A137859 |
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Number of primes between the n-th squared twin prime pair. |
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+0
3
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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
(list; graph; listen)
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OFFSET
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1,1
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COMMENT
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a(n) = SUM(A010051(k): A006512(n)^2 <= k <= A001359(n)^2) =
A000720(A006512(n)^2)-A000720(A001359(n)^2).
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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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CROSSREFS
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Cf. A079629, A137860.
Sequence in context: A049329 A117827 A134736 this_sequence A082576 A074185 A047438
Adjacent sequences: A137856 A137857 A137858 this_sequence A137860 A137861 A137862
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KEYWORD
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nonn
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AUTHOR
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Reinhard Zumkeller (reinhard.zumkeller(AT)gmail.com), Feb 16 2008
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