%I #8 Mar 11 2018 21:44:59
%S 1,13,523,225048,92159003874,16451345373352824
%N Number of cycles in the n-polygon diagonal intersection graph.
%H Eric Weisstein's World of Mathematics, <a href="http://mathworld.wolfram.com/GraphCycle.html">Graph Cycle</a>
%H Eric Weisstein's World of Mathematics, <a href="http://mathworld.wolfram.com/PolygonDiagonalIntersectionGraph.html">Polygon Diagonal Intersection Graph</a>
%Y Cf. A294992, A300513, A300551.
%K nonn,more
%O 3,2
%A _Eric W. Weisstein_, Mar 08 2018
%E a(7)-a(8) from _Andrew Howroyd_, Mar 11 2018