A121552 - cp's OEIS frontend

A121552 Triangle read by rows: T(n,k) is the number of deco polyominoes of height n and area k (n>=1, k>=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	0
3	2
4	0
5	0
6	4
7	2
8	0
9	0
10	0
11	8
12	8
13	6
14	2
15	0
16	0
17	0
18	0
19	16
20	24
21	28
22	26
23	16
24	8
25	2
26	0
27	0
28	0
29	0
30	0
31	32
32	64
33	96
34	120
35	126
36	110
37	82
38	52
39	26
40	10
41	2
42	0
43	0
44	0
45	0
46	0
47	0
48	64
49	160
50	288
51	432
52	564
53	658
54	680
55	638
56	542
57	416
58	284
59	172
60	90
61	38
62	12
63	2
64	0
65	0
66	0
67	0
68	0
69	0
70	0
71	128
72	384
73	800
74	1376
75	2072

[1, 0, 2, 0, 0, 4, 2, 0, 0, 0, 8, 8, 6, 2, 0, 0, 0, 0, 16, 24, 28, 26, 16, 8, 2, 0, 0, 0, 0, 0, 32, 64, 96, 120, 126, 110, 82, 52, 26, 10, 2, 0, 0, 0, 0, 0, 0, 64, 160, 288, 432, 564, 658, 680, 638, 542, 416, 284, 172, 90, 38, 12, 2, 0, 0, 0, 0, 0, 0, 0, 128, 384, 800, 1376, 2072]

cp's OEIS Frontend

A121552 Triangle read by rows: T(n,k) is the number of deco polyominoes of height n and area k (n>=1, k>=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