Number of n-celled polyiamonds with perimeter < n+2.
A137191
Number of n-celled polyiamonds with perimeter < n+2.
Terms
- a(0) =0a(1) =0a(2) =0a(3) =0a(4) =0a(5) =1a(6) =1a(7) =4a(8) =11a(9) =39a(10) =120a(11) =403a(12) =1254a(13) =4000a(14) =12475a(15) =39030
External references
- oeis: A137191