The number of simple polygons having all points of a 3 X n grid as vertices.
A331235
The number of simple polygons having all points of a 3 X n grid as vertices.
Terms
- a(0) =0a(1) =1a(2) =8a(3) =62a(4) =532a(5) =4846a(6) =45712a(7) =441458a(8) =4337468a(9) =43187630a(10) =434602280a(11) =4411598154a(12) =45107210436a(13) =464047175770
External references
- oeis: A331235