Triangle read by rows: T(n,k) is the number of deco polyominoes of height n and having k 1-cell columns (0<=k<=n). A deco polyomino is a directed column-convex polyomino in which the height, measured along the diagonal, is attained only in the last column.
A121554
Triangle read by rows: T(n,k) is the number of deco polyominoes of height n and having k 1-cell columns (0<=k<=n). 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) =0a(2) =1a(3) =1a(4) =0a(5) =1a(6) =2a(7) =2a(8) =1a(9) =1a(10) =7a(11) =7a(12) =6a(13) =3a(14) =1a(15) =30a(16) =35a(17) =30a(18) =18a(19) =6a(20) =1a(21) =157a(22) =205a(23) =184a(24) =117a(25) =46a(26) =10a(27) =1a(28) =972a(29) =1392
External references
- oeis: A121554