A121586 - cp's OEIS frontend

A121586 Number of columns 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.

n	a(n)
0	1
1	1
2	3
3	13
4	70
5	446
6	3276
7	27252
8	253296
9	2602224
10	29288160
11	358457760
12	4740577920
13	67375532160
14	1024208720640
15	16583626886400
16	284953145702400
17	5178968115148800
18	99268112350310400
19	2001336861359001600
20	42337994134947840000
21	937755916997437440000

[1, 1, 3, 13, 70, 446, 3276, 27252, 253296, 2602224, 29288160, 358457760, 4740577920, 67375532160, 1024208720640, 16583626886400, 284953145702400, 5178968115148800, 99268112350310400, 2001336861359001600, 42337994134947840000, 937755916997437440000]

cp's OEIS Frontend

A121586 Number of columns 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.

Table of values

List of values