Number of deco polyominoes of height n, consisting only of columns of odd length. A deco polyomino is a directed column-convex polyomino in which the height, measured along the diagonal, is attained only in the last column.
A121749
Number of deco polyominoes of height n, consisting only of columns of odd length. A deco polyomino is a directed column-convex polyomino in which the height, measured along the diagonal, is attained only in the last column.
Terms
- a(0) =1a(1) =1a(2) =2a(3) =6a(4) =16a(5) =66a(6) =246a(7) =1248a(8) =5976a(9) =36120a(10) =210480a(11) =1479600a(12) =10140480a(13) =81340560a(14) =640367280a(15) =5773662720a(16) =51312240000a(17) =513773124480
External references
- oeis: A121749