A301748 Number of faces in the n-polygon diagonal intersection graph.

5, 12, 25, 51, 81, 155, 221, 376, 445, 782, 953, 1457, 1697, 2501, 2467, 4030, 4501, 6176, 6821, 9087, 9025, 12927, 13989, 17876, 19181, 24130, 21481, 31901, 33857, 41417, 43793, 52922, 52957, 66676, 69997, 82955, 86801, 102051, 97735, 124272, 129405, 149942, 155849

Offset: 4

Author

Eric W. Weisstein, Mar 26 2018

Keywords

• nonn

Links

• Eric Weisstein's World of Mathematics, Face
• Eric Weisstein's World of Mathematics, Polygon Diagonal Intersection Graph

Crossrefs

Cf. A007569 (vertex count).

Cf. A135565 (edge count).

Formula

a(n) = 2-A007569(n)+A135565(n) (by the polyhedral formula).