Triangle read by rows: T(n,k) is the number of deco polyominoes of height n and vertical height (i.e., number of rows) k (1 <= 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.
A121692
Triangle read by rows: T(n,k) is the number of deco polyominoes of height n and vertical height (i.e., number of rows) k (1 <= 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) =1a(2) =1a(3) =1a(4) =4a(5) =1a(6) =1a(7) =10a(8) =12a(9) =1a(10) =1a(11) =22a(12) =57a(13) =39a(14) =1a(15) =1a(16) =46a(17) =216a(18) =293a(19) =163a(20) =1a(21) =1a(22) =94a(23) =741a(24) =1651a(25) =1664a(26) =888a(27) =1a(28) =1a(29) =190
External references
- oeis: A121692