Number of free poly-IH19-tiles (holes allowed) with n cells.
A197552
Number of free poly-IH19-tiles (holes allowed) with n cells.
Terms
- a(0) =1a(1) =1a(2) =4a(3) =10a(4) =36a(5) =146a(6) =631a(7) =2815a(8) =12987a(9) =60601a(10) =286376a(11) =1364399a(12) =6546220a(13) =31585133
External references
- oeis: A197552