A300552 Number of 4-cycles in the n-polygon diagonal intersection graph.

0, 5, 10, 24, 35, 80, 90, 170, 220, 420, 364, 644, 780, 1120, 1139, 1854, 1748, 2580, 2898, 3916, 3450, 6072, 5350, 7046, 7398, 10024, 10063, 14250, 13795, 16608, 16566, 21114, 21595, 26316, 26640, 32718, 32370, 39520, 38622, 52416, 47558, 56232, 57240

Offset: 3

Author

Eric W. Weisstein, Mar 08 2018

Keywords

• nonn

Links

• Andrew Howroyd, Table of n, a(n) for n = 3..100
• Eric Weisstein's World of Mathematics, Graph Cycle
• Eric Weisstein's World of Mathematics, Polygon Diagonal Intersection Graph

Crossrefs

Cf. A062361 (3-cycles), A300553 (5-cycles), A300554 (6-cycles).

Extensions

Terms a(21) and beyond from Andrew Howroyd, Mar 11 2018