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A125517
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Number of prime 5-tuples up to 10^n.
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0
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0, 3, 5, 9, 21, 65, 321, 1383, 7221, 40414, 245312, 1552223, 10217560, 69410576, 485081195, 3473135825
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OFFSET
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1,2
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LINKS
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EXAMPLE
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a(3)=5 because there are 5 prime 5-tuples less than 10^3: 3 of the form p + 0,2,6,8,12 (for p = 5,11 and 101) and 2 of the form p + 0,4,6,10,12 (for p = 7 and 97).
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CROSSREFS
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KEYWORD
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nonn,more
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AUTHOR
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EXTENSIONS
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STATUS
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approved
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