Number of free holey polyominoes of n cells with simply-connected interiors.
A359520
Number of free holey polyominoes of n cells with simply-connected interiors.
Terms
- a(0) =0a(1) =0a(2) =0a(3) =0a(4) =0a(5) =0a(6) =1a(7) =5a(8) =35a(9) =179a(10) =909a(11) =4285a(12) =19702a(13) =88040a(14) =386826a(15) =1674852a(16) =7174436a(17) =30462009
External references
- oeis: A359520