A121637 - cp's OEIS frontend

A121637 Triangle read by rows: T(n,k) is the number of deco polyominoes of height n and having k 2-cell columns (n>=1; 0<=k<=n-1). 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	2
5	3
6	1
7	7
8	10
9	6
10	1
11	29
12	47
13	33
14	10
15	1
16	147
17	265
18	210
19	82
20	15
21	1
22	889
23	1740
24	1521
25	697
26	171
27	21
28	1
29	6252
30	13087
31	12373
32	6377
33	1885
34	317
35	28
36	1
37	50163
38	111066
39	112016
40	63261
41	21390
42	4407
43	540
44	36
45	1
46	452356
47	1050608
48	1118991
49	680541
50	255245
51	60903
52	9247
53	863
54	45
55	1

[1, 1, 1, 2, 3, 1, 7, 10, 6, 1, 29, 47, 33, 10, 1, 147, 265, 210, 82, 15, 1, 889, 1740, 1521, 697, 171, 21, 1, 6252, 13087, 12373, 6377, 1885, 317, 28, 1, 50163, 111066, 112016, 63261, 21390, 4407, 540, 36, 1, 452356, 1050608, 1118991, 680541, 255245, 60903, 9247, 863, 45, 1]

cp's OEIS Frontend

A121637 Triangle read by rows: T(n,k) is the number of deco polyominoes of height n and having k 2-cell columns (n>=1; 0<=k<=n-1). 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