Number of free polyominoes of n cells with multiply-connected interiors.
A359519
Number of free polyominoes of n cells with multiply-connected interiors.
Terms
- a(0) =0a(1) =0a(2) =0a(3) =0a(4) =0a(5) =0a(6) =0a(7) =1a(8) =2a(9) =16a(10) =70a(11) =378a(12) =1772a(13) =8456a(14) =38623a(15) =174400a(16) =771944a(17) =3378937
External references
- oeis: A359519