A121581 - cp's OEIS frontend

A121581 Triangle read by rows: T(n,k) is the number of deco polyominoes of height n having k cells in the second column (n>=1, k>=0). 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	1
4	1
5	3
6	2
7	1
8	9
9	11
10	3
11	1
12	33
13	43
14	39
15	4
16	1
17	153
18	193
19	199
20	169
21	5
22	1
23	873
24	1057
25	1099
26	1081
27	923
28	6
29	1
30	5913
31	6937
32	7147
33	7171
34	7027
35	6117
36	7
37	1
38	46233
39	53017
40	54187
41	54403
42	54307
43	53413
44	47311
45	8
46	1
47	409113
48	461257
49	468907
50	470203
51	470323
52	469483
53	463399

[1, 1, 1, 1, 3, 2, 1, 9, 11, 3, 1, 33, 43, 39, 4, 1, 153, 193, 199, 169, 5, 1, 873, 1057, 1099, 1081, 923, 6, 1, 5913, 6937, 7147, 7171, 7027, 6117, 7, 1, 46233, 53017, 54187, 54403, 54307, 53413, 47311, 8, 1, 409113, 461257, 468907, 470203, 470323, 469483, 463399]

cp's OEIS Frontend

A121581 Triangle read by rows: T(n,k) is the number of deco polyominoes of height n having k cells in the second column (n>=1, k>=0). 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