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%I #27 Sep 16 2025 10:13:05
%S 0,44,1216,35877,2031122
%N Number of fundamentally different graceful labelings of the n-double cone graph.
%H Eric Weisstein's World of Mathematics, <a href="https://mathworld.wolfram.com/DoubleConeGraph.html">Double Cone Graph</a>.
%H Eric Weisstein's World of Mathematics, <a href="https://mathworld.wolfram.com/GracefulLabeling.html">Graceful Labeling</a>.
%K nonn,more
%O 3,2
%A _Eric W. Weisstein_, Sep 15 2025