%I #5 Feb 16 2025 08:34:00
%S 1,0,0,4,52,136,180,72,4
%N Number of graceful labelings of the complement of the path graph P_n.
%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/PathComplementGraph.html">Path Complement Graph</a>
%K nonn,more,changed
%O 1,4
%A _Eric W. Weisstein_, Jul 21 2020