Number of achiral polyominoes in {4,5} tessellation of the hyperbolic plane.
A390193
Number of achiral polyominoes in {4,5} tessellation of the hyperbolic plane.
Terms
- a(0) =1a(1) =1a(2) =2a(3) =3a(4) =7a(5) =11a(6) =29a(7) =47a(8) =128a(9) =214a(10) =594a(11) =1019a(12) =2861a(13) =5003a(14) =14173a(15) =25149a(16) =71758a(17) =128787a(18) =369671a(19) =669535
External references
- oeis: A390193