3929616

Appears in sequences

• Number of 2-cell columns starting at level 0 in all of 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.at n=9A121636
• (n-1)-st elementary symmetric function of the first n terms of (1,2,1,3,1,4,1,5,...)=A133622.at n=16A203193