Number of polygons with polygonal holes on the square lattice enumerated by half-perimeter.
A088702
Number of polygons with polygonal holes on the square lattice enumerated by half-perimeter.
Terms
- a(0) =0a(1) =1a(2) =2a(3) =7a(4) =28a(5) =124a(6) =588a(7) =2939a(8) =15292a(9) =82168a(10) =453376a(11) =2558074a(12) =14712038a(13) =86029132a(14) =510455002a(15) =3068304865a(16) =18658787150a(17) =114663168405a(18) =711391109162
External references
- oeis: A088702