Number of polygons that can be formed from n points on a circle, no two adjacent.
A002816
Number of polygons that can be formed from n points on a circle, no two adjacent.
Terms
- a(0) =1a(1) =0a(2) =0a(3) =0a(4) =1a(5) =3a(6) =23a(7) =177a(8) =1553a(9) =14963a(10) =157931a(11) =1814453a(12) =22566237a(13) =302267423a(14) =4340478951a(15) =66541218865
External references
- oeis: A002816