The number of free polyiamonds with n cells on an order-7 triangular tiling of the hyperbolic plane.
A330659
The number of free polyiamonds with n cells on an order-7 triangular tiling of the hyperbolic plane.
Terms
- a(0) =1a(1) =1a(2) =1a(3) =1a(4) =3a(5) =4a(6) =12a(7) =27a(8) =78a(9) =208a(10) =637a(11) =1870a(12) =5797a(13) =17866a(14) =56237a(15) =177573a(16) =566904a(17) =1818527a(18) =5874180a(19) =19065038
External references
- oeis: A330659