A380283 - cp's OEIS frontend

A380283 Irregular triangle read by rows: T(n,k) is the number of regions between the free polyominoes, with n cells and width k, and their bounding boxes, n >= 1, 1 <= k <= ceiling(n/2).

n	a(n)
1	0
2	0
3	0
4	1
5	0
6	5
7	0
8	7
9	14
10	0
11	19
12	52
13	0
14	34
15	173
16	48
17	0
18	74
19	503
20	384
21	0
22	134
23	1368
24	1918
25	210
26	0
27	282
28	3642
29	7742
30	2307
31	0
32	524
33	9552
34	26843
35	16267
36	752
37	0
38	1064
39	24889
40	87343
41	84789
42	11556
43	0
44	2017
45	64200
46	272599
47	370799
48	103336
49	2833
50	0
51	4009
52	164826
53	838160
54	1445347
55	678863
56	52437

[0, 0, 0, 1, 0, 5, 0, 7, 14, 0, 19, 52, 0, 34, 173, 48, 0, 74, 503, 384, 0, 134, 1368, 1918, 210, 0, 282, 3642, 7742, 2307, 0, 524, 9552, 26843, 16267, 752, 0, 1064, 24889, 87343, 84789, 11556, 0, 2017, 64200, 272599, 370799, 103336, 2833, 0, 4009, 164826, 838160, 1445347, 678863, 52437]

cp's OEIS Frontend

A380283 Irregular triangle read by rows: T(n,k) is the number of regions between the free polyominoes, with n cells and width k, and their bounding boxes, n >= 1, 1 <= k <= ceiling(n/2).

Table of values

List of values