A379637 - cp's OEIS frontend

A379637 Irregular triangle read by rows: T(n,k) is the sum of the widths of the free polyominoes with n cells and width k, n >= 1, 1 <= k <= ceiling(n/2).

n	a(n)
1	1
2	1
3	1
4	2
5	1
6	8
7	1
8	10
9	18
10	1
11	24
12	66
13	1
14	36
15	213
16	72
17	1
18	74
19	579
20	552
21	1
22	120
23	1470
24	2644
25	365
26	1
27	234
28	3663
29	10188
30	3845
31	1
32	400
33	9033
34	33668
35	25945
36	1530
37	1
38	758
39	22179
40	104656
41	129600
42	22458
43	1
44	1338
45	54075
46	312296
47	544170
48	192228
49	6650
50	1
51	2500
52	131541
53	919524
54	2041085
55	1211736
56	117733

[1, 1, 1, 2, 1, 8, 1, 10, 18, 1, 24, 66, 1, 36, 213, 72, 1, 74, 579, 552, 1, 120, 1470, 2644, 365, 1, 234, 3663, 10188, 3845, 1, 400, 9033, 33668, 25945, 1530, 1, 758, 22179, 104656, 129600, 22458, 1, 1338, 54075, 312296, 544170, 192228, 6650, 1, 2500, 131541, 919524, 2041085, 1211736, 117733]

cp's OEIS Frontend

A379637 Irregular triangle read by rows: T(n,k) is the sum of the widths of the free polyominoes with n cells and width k, n >= 1, 1 <= k <= ceiling(n/2).

Table of values

List of values