Number of columns ending at an odd level 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.
A121752
Number of columns ending at an odd level 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) =2a(2) =7a(3) =39a(4) =235a(5) =1746a(6) =14166a(7) =132408a(8) =1341432a(9) =15148080a(10) =183764880a(11) =2435607360a(12) =34406268480a(13) =523839899520
External references
- oeis: A121752