Number of unbiased free polyominoes with 2n squares.
A234012
Number of unbiased free polyominoes with 2n squares.
Terms
- a(0) =1a(1) =4a(2) =24a(3) =230a(4) =2601a(5) =32810a(6) =433855a(7) =5923677a(8) =82675193a(9) =1173878266
External references
- oeis: A234012