A121638 - cp's OEIS frontend

A121638 Number of deco polyominoes of height n, having no 2-cell columns. 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	1
3	2
4	7
5	29
6	147
7	889
8	6252
9	50163
10	452356
11	4529812
12	49878095
13	598989496
14	7791393260
15	109129383735
16	1637539745521
17	26208427321596
18	445652393850867
19	8023380629061127
20	152470440379483009
21	3049854459983511047
22	64054967040282793114
23	1409361745326600931517

[1, 1, 2, 7, 29, 147, 889, 6252, 50163, 452356, 4529812, 49878095, 598989496, 7791393260, 109129383735, 1637539745521, 26208427321596, 445652393850867, 8023380629061127, 152470440379483009, 3049854459983511047, 64054967040282793114, 1409361745326600931517]

cp's OEIS Frontend

A121638 Number of deco polyominoes of height n, having no 2-cell columns. 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