Triangle read by rows: T(n,k) is the number of deco polyominoes of height n with k cells in the second row (0<=k<=n-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).
A134436
Triangle read by rows: T(n,k) is the number of deco polyominoes of height n with k cells in the second row (0<=k<=n-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) =1a(2) =1a(3) =1a(4) =3a(5) =2a(6) =1a(7) =7a(8) =10a(9) =6a(10) =1a(11) =16a(12) =37a(13) =42a(14) =24a(15) =1a(16) =44a(17) =125a(18) =214a(19) =216a(20) =120a(21) =1a(22) =169a(23) =465a(24) =959a(25) =1406a(26) =1320a(27) =720a(28) =1a(29) =895
External references
- oeis: A134436