Number of columns in all deco polyominoes of height 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.
A121586
Number of columns in all deco polyominoes of height 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) =3a(3) =13a(4) =70a(5) =446a(6) =3276a(7) =27252a(8) =253296a(9) =2602224a(10) =29288160a(11) =358457760a(12) =4740577920a(13) =67375532160
External references
- oeis: A121586