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%I #9 Dec 04 2024 20:54:03
%S 4,10,16,28,46,74,122,198,320
%N Circumference of the n-Lucas cube graph.
%C a(n) = 2*A245968(n) = A000032(n) - A100063 = LucasL[n] - 2/3 (Cos[2 n Pi/3] + 2) for known terms starting with n == 5.
%H Eric Weisstein's World of Mathematics, <a href="https://mathworld.wolfram.com/GraphCircumference.html">Graph Circumference</a>.
%H Eric Weisstein's World of Mathematics, <a href="https://mathworld.wolfram.com/LucasCubeGraph.html">Lucas Cube Graph</a>.
%K nonn,more,new
%O 4,1
%A _Eric W. Weisstein_, Dec 04 2024