Number of deco polyominoes of area 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.
A121691
Number of deco polyominoes of area 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) =2a(2) =4a(3) =10a(4) =24a(5) =62a(6) =158a(7) =410a(8) =1064a(9) =2774a(10) =7236a(11) =18908a(12) =49428a(13) =129286a(14) =338254a(15) =885188a(16) =2316766a(17) =6064184a(18) =15874084a(19) =41555086a(20) =108785772a(21) =284792646a(22) =745574864a(23) =1951901064a(24) =5110072712a(25) =13378217392a(26) =35024400076a(27) =91694660704a(28) =240059002292
External references
- oeis: A121691