Total area of 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.
A121553
Total area of 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) =4a(2) =20a(3) =122a(4) =874a(5) =7164a(6) =65988a(7) =674064a(8) =7558416a(9) =92276640a(10) =1218255840a(11) =17293495680a(12) =262656570240
External references
- oeis: A121553