A121301 - cp's OEIS frontend

A121301 Triangle read by rows: T(n,k) is the number of directed column-convex polyominoes of area n and having k cells in the shortest column (1<=k<=n).

n	a(n)
1	1
2	1
3	1
4	4
5	0
6	1
7	10
8	2
9	0
10	1
11	28
12	5
13	0
14	0
15	1
16	75
17	10
18	3
19	0
20	0
21	1
22	202
23	23
24	7
25	0
26	0
27	0
28	1
29	540
30	57
31	8
32	4
33	0
34	0
35	0
36	1
37	1440
38	129
39	18
40	9
41	0
42	0
43	0
44	0
45	1
46	3828
47	294
48	43
49	10
50	5
51	0
52	0
53	0
54	0
55	1
56	10153
57	680
58	90
59	11
60	11
61	0
62	0
63	0
64	0
65	0
66	1
67	26875
68	1557
69	178
70	28
71	12
72	6
73	0
74	0
75	0
76	0
77	0
78	1
79	71021
80	3546
81	362
82	69
83	13
84	13
85	0
86	0
87	0
88	0
89	0
90	0
91	1

[1, 1, 1, 4, 0, 1, 10, 2, 0, 1, 28, 5, 0, 0, 1, 75, 10, 3, 0, 0, 1, 202, 23, 7, 0, 0, 0, 1, 540, 57, 8, 4, 0, 0, 0, 1, 1440, 129, 18, 9, 0, 0, 0, 0, 1, 3828, 294, 43, 10, 5, 0, 0, 0, 0, 1, 10153, 680, 90, 11, 11, 0, 0, 0, 0, 0, 1, 26875, 1557, 178, 28, 12, 6, 0, 0, 0, 0, 0, 1, 71021, 3546, 362, 69, 13, 13, 0, 0, 0, 0, 0, 0, 1]

cp's OEIS Frontend

A121301 Triangle read by rows: T(n,k) is the number of directed column-convex polyominoes of area n and having k cells in the shortest column (1<=k<=n).

Table of values

List of values