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 A290348 Denominators of the Harary index for the n-halved cube graph. 1
 1, 1, 1, 1, 1, 3, 3, 3, 1, 5, 5, 15, 15, 105, 105, 105, 105, 315, 315, 315, 315, 3465, 3465, 3465, 693, 9009, 3003, 3003, 3003, 5005, 5005, 5005, 5005, 85085, 17017, 153153, 153153, 2909907, 2909907, 14549535 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,6 LINKS Eric Weisstein's World of Mathematics, Halved Cube Graph Eric Weisstein's World of Mathematics, Hypercube Graph EXAMPLE First few terms are 0, 1, 6, 26, 100, 1096/3, 3920/3, 13936/3, 16544, 296256/5, .... MATHEMATICA Table[-2^(n - 1) HarmonicNumber[n] - 2^(2 n - 1) Re[LerchPhi[2, 1, n + 1]], {n, 20}] // Denominator CROSSREFS Cf. A290347 (numerators). Sequence in context: A059289 A201277 A163644 * A014465 A226645 A243095 Adjacent sequences:  A290345 A290346 A290347 * A290349 A290350 A290351 KEYWORD nonn,frac AUTHOR Eric W. Weisstein, Jul 28 2017 STATUS approved

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Last modified April 6 18:48 EDT 2020. Contains 333286 sequences. (Running on oeis4.)