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Total number of graceful labelings of all simple graphs on n nodes.
0

%I #14 Dec 15 2024 09:30:23

%S 1,2,16,144,1428,25328,631026,25087224

%N Total number of graceful labelings of all simple graphs on n nodes.

%C Counts are for all labelings, not just fundamental ones, so includes labelings that are equivalent under the graph's automorphism group and via subtractive complementation. - _Eric W. Weisstein_, Dec 15 2024

%H Eric Weisstein's World of Mathematics, <a href="https://mathworld.wolfram.com/GracefulLabeling.html">Graceful Labeling</a>.

%H Eric Weisstein's World of Mathematics, <a href="https://mathworld.wolfram.com/SimpleGraph.html">Simple Graph</a>.

%K nonn,more,hard,changed

%O 1,2

%A _Eric W. Weisstein_, Apr 03 2020

%E a(8) from _Eric W. Weisstein_, Jul 30 2020