Denominators of the Kirchhoff (and Harary) index for the n-hypercube graph.

Terms

a(0) =1a(1) =1a(2) =1a(3) =3a(4) =3a(5) =15a(6) =15a(7) =105a(8) =105a(9) =315a(10) =63a(11) =693a(12) =693a(13) =9009a(14) =9009a(15) =45045a(16) =45045a(17) =765765a(18) =765765a(19) =14549535a(20) =14549535a(21) =14549535a(22) =14549535a(23) =334639305a(24) =334639305a(25) =1673196525a(26) =1673196525a(27) =5019589575a(28) =5019589575a(29) =145568097675