Number of polyiamonds with 2n cells that tile the plane by translation but not by 180-degree rotation (Conway criterion).
A075217
Number of polyiamonds with 2n cells that tile the plane by translation but not by 180-degree rotation (Conway criterion).
Terms
- a(0) =0a(1) =0a(2) =0a(3) =0a(4) =1a(5) =22a(6) =38a(7) =504a(8) =1468a(9) =6945a(10) =11046a(11) =115186a(12) =119496a(13) =677774a(14) =2013619
External references
- oeis: A075217