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A160046
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Numerator of the Harary number for the cycle graph C_n.
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1
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0, 1, 3, 5, 15, 10, 77, 47, 75, 131, 1507, 142, 637, 353, 1089, 1487, 12937, 6989, 135451, 7255, 7381, 82451, 1925353, 84866, 430105, 1132133, 3437979, 1158863, 33980257, 1183745, 37068467, 4828073, 2436559, 41781863, 42142223, 42482563
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OFFSET
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1,3
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COMMENTS
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Extended to a(1)-a(2) using the formula.
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LINKS
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EXAMPLE
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0, 1, 3, 5, 15/2, 10, 77/6, 47/3, 75/4, 131/6, ...
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MATHEMATICA
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Numerator[Table[1 - Mod[n, 2] + n HarmonicNumber[Floor[(n - 1)/2]], {n, 20}]] (* Eric W. Weisstein, Dec 06 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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