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%I #8 Mar 27 2018 09:45:30
%S 5,12,25,51,81,155,221,376,445,782,953,1457,1697,2501,2467,4030,4501,
%T 6176,6821,9087,9025,12927,13989,17876,19181,24130,21481,31901,33857,
%U 41417,43793,52922,52957,66676,69997,82955,86801,102051,97735,124272,129405,149942,155849
%N Number of faces in the n-polygon diagonal intersection graph.
%H Eric Weisstein's World of Mathematics, <a href="http://mathworld.wolfram.com/Face.html">Face</a>
%H Eric Weisstein's World of Mathematics, <a href="http://mathworld.wolfram.com/PolygonDiagonalIntersectionGraph.html">Polygon Diagonal Intersection Graph</a>
%F a(n) = 2-A007569(n)+A135565(n) (by the polyhedral formula).
%Y Cf. A007569 (vertex count).
%Y Cf. A135565 (edge count).
%K nonn
%O 4,1
%A _Eric W. Weisstein_, Mar 26 2018
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