Number of simply 4-connected polyominoes of site-perimeter n.
A216818
Number of simply 4-connected polyominoes of site-perimeter n.
Terms
- a(0) =1a(1) =0a(2) =2a(3) =4a(4) =12a(5) =32a(6) =110a(7) =340a(8) =1193a(9) =4080a(10) =14786a(11) =53428
External references
- oeis: A216818