A121553 - cp's OEIS frontend

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.

n	a(n)
1	1
2	4
3	20
4	122
5	874
6	7164
7	65988
8	674064
9	7558416
10	92276640
11	1218255840
12	17293495680
13	262656570240
14	4250077896960
15	72992067321600
16	1326101675673600
17	25410150701107200
18	512158576546713600
19	10832221231772774400

[1, 4, 20, 122, 874, 7164, 65988, 674064, 7558416, 92276640, 1218255840, 17293495680, 262656570240, 4250077896960, 72992067321600, 1326101675673600, 25410150701107200, 512158576546713600, 10832221231772774400]

cp's OEIS Frontend

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.

Table of values

List of values