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A186976
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Number of ordered quintuples of distinct pairwise coprime positive integers with largest element n.
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4
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2, 1, 3, 0, 26, 1, 72, 9, 14, 29, 228, 15, 431, 55, 115, 75, 928, 70, 743, 205, 633, 225, 2499, 70, 3571, 958, 1085, 728, 1626, 350, 6979, 1231, 2061, 822, 10800, 450, 13978, 2361, 2750, 2772, 20114, 1507, 15718, 2761, 7370, 4422, 33082, 2457, 13971
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OFFSET
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7,1
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LINKS
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EXAMPLE
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a(7) = 2 because there are 2 ordered quintuples of distinct pairwise coprime positive integers with largest element 7: (1,2,3,5,7), (1,3,4,5,7).
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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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