%I #10 Oct 14 2020 23:18:12
%S 1,2,16,2592,466308864
%N Number of graceful labelings of the n-hypercube graph Q_n.
%C a(4) computed by _Bert Dobbelaere_
%H Eric Weisstein's World of Mathematics, <a href="http://mathworld.wolfram.com/GracefulLabeling.html">Graceful Labeling</a>
%H Eric Weisstein's World of Mathematics, <a href="http://mathworld.wolfram.com/HypercubeGraph.html">Hypercube Graph</a>
%Y Cf. A334247.
%K nonn,hard,more
%O 0,2
%A _Eric W. Weisstein_, Oct 06 2020