a(n) is the number of n-celled treelike polyominoes in the {4,5} tessellation of the hyperbolic plane.
A390195
a(n) is the number of n-celled treelike polyominoes in the {4,5} tessellation of the hyperbolic plane.
Terms
- a(0) =1a(1) =1a(2) =2a(3) =5a(4) =15a(5) =54a(6) =214a(7) =928a(8) =4191a(9) =19621a(10) =93874a(11) =457561a(12) =2261678a(13) =11316094a(14) =57202543a(15) =291787443
External references
- oeis: A390195