Number of standardized 4-connected corner polyominoes of inner site-perimeter n.
A216946
Number of standardized 4-connected corner polyominoes of inner site-perimeter n.
Terms
- a(0) =1a(1) =3a(2) =12a(3) =46a(4) =209a(5) =976a(6) =4767a(7) =23680a(8) =119940
External references
- oeis: A216946