Number of deco polyominoes of height n in which all columns end at an odd level. A deco polyomino is a directed column-convex polyomino in which the height, measured along the diagonal, is attained only in the last column.
A121753
Number of deco polyominoes of height n in which all columns end at an odd level. 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) =2a(3) =6a(4) =16a(5) =62a(6) =230a(7) =1114a(8) =5268a(9) =30702a(10) =176226a(11) =1201638a(12) =8107464a(13) =63339702a(14) =491010102a(15) =4324845834a(16) =37867131900a(17) =371275954758
External references
- oeis: A121753