%I #19 Sep 16 2025 08:17:38

%S 2,4,16,120,928,8232,106616,1710288,32609624,738615864,19773964576

%N Total number of graceful labelings of the n-centipede graph.

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

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

%H Wikipedia, <a href="https://en.wikipedia.org/wiki/Graceful_labeling">Graceful labeling</a>

%F a(n) = 4*A387794(n) for n >= 2. - _Eric W. Weisstein_, Sep 12 2025

%Y Cf. A387794 (fundamentally different labelings).

%K nonn,more

%O 1,1

%A _Eric W. Weisstein_, Apr 24 2020

%E a(7) from _Pontus von Brömssen_, Aug 06 2020

%E a(8)-a(9) from _Eric W. Weisstein_, Sep 08 2025

%E a(10) from _Eric W. Weisstein_, Sep 12 2025

%E a(11) from _Eric W. Weisstein_, Sep 16 2025