Triangle read by rows: T(n,k) is the number of deco polyominoes of height n having k cells in the first two columns (n>=1, k>=1). A deco polyomino is a directed column-convex polyomino in which the height, measured along the diagonal, is attained only in the last column.
A121583
Triangle read by rows: T(n,k) is the number of deco polyominoes of height n having k cells in the first two columns (n>=1, k>=1). 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) =2a(3) =0a(4) =1a(5) =4a(6) =1a(7) =0a(8) =2a(9) =6a(10) =10a(11) =5a(12) =1a(13) =0a(14) =6a(15) =16a(16) =29a(17) =34a(18) =23a(19) =11a(20) =1a(21) =0a(22) =24a(23) =60a(24) =102a(25) =148a(26) =154a(27) =119a(28) =77a(29) =35
External references
- oeis: A121583