Number of free poly-IH22-tiles (holes allowed) with n cells.
A213860
Number of free poly-IH22-tiles (holes allowed) with n cells.
Terms
- a(0) =1a(1) =3a(2) =8a(3) =30a(4) =106a(5) =413a(6) =1616a(7) =6525a(8) =26588a(9) =109900a(10) =457964a(11) =1924270a(12) =8135692a(13) =34592460a(14) =147780810
External references
- oeis: A213860