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%I #5 Feb 16 2025 08:33:49
%S 0,1,4,227,334,96661,140663,10194871,30803116,6854577137,10830776629,
%T 4228148644729,3474650044156,7849737483616471
%N Numerators of the Kirchhoff sum index for the n-hypercube graph.
%H Eric Weisstein's World of Mathematics, <a href="https://mathworld.wolfram.com/HypercubeGraph.html">Hypercube Graph</a>
%H Eric Weisstein's World of Mathematics, <a href="https://mathworld.wolfram.com/KirchhoffSumIndex.html">Kirchhoff Sum Index</a>
%e First few Kirchhoff sum indices are 0, 1, 4, 227/18, 334/9, 96661/900, 140663/450, 10194871/11025, ....
%Y Cf. A290345 (denominators).
%K nonn,more,frac
%O 0,3
%A _Eric W. Weisstein_, Jul 28 2017