Number of perforated polyominoes with n cells, identifying mirror images.
A294151
Number of perforated polyominoes with n cells, identifying mirror images.
Terms
- a(0) =1a(1) =1a(2) =2a(3) =3a(4) =8a(5) =13a(6) =36a(7) =76a(8) =202a(9) =482a(10) =1281a(11) =3277a(12) =8749a(13) =23083a(14) =62056a(15) =166498a(16) =450576a(17) =1220542a(18) =3321870a(19) =9057388a(20) =24769906
External references
- oeis: A294151