A226997 - cp's OEIS frontend

A226997 Irregular triangle read by rows: T(n,k) is the number of distinct tilings by squares of an n X n square lattice that contain k nodes unconnected to any of their neighbors.

n	a(n)
1	1
2	1
3	1
4	1
5	4
6	0
7	0
8	1
9	1
10	9
11	16
12	8
13	5
14	0
15	0
16	0
17	0
18	1
19	1
20	16
21	78
22	140
23	88
24	44
25	68
26	32
27	0
28	4
29	0
30	0
31	0
32	0
33	0
34	0
35	1
36	1
37	25
38	228
39	964
40	2003
41	2178
42	1842
43	1626
44	725
45	290
46	376
47	184
48	140
49	76
50	4
51	0
52	5
53	0
54	0
55	0
56	0
57	0
58	0
59	0
60	0
61	1
62	1
63	36
64	520
65	3920
66	16859
67	42944
68	67312

[1, 1, 1, 1, 4, 0, 0, 1, 1, 9, 16, 8, 5, 0, 0, 0, 0, 1, 1, 16, 78, 140, 88, 44, 68, 32, 0, 4, 0, 0, 0, 0, 0, 0, 1, 1, 25, 228, 964, 2003, 2178, 1842, 1626, 725, 290, 376, 184, 140, 76, 4, 0, 5, 0, 0, 0, 0, 0, 0, 0, 0, 1, 1, 36, 520, 3920, 16859, 42944, 67312]

cp's OEIS Frontend

A226997 Irregular triangle read by rows: T(n,k) is the number of distinct tilings by squares of an n X n square lattice that contain k nodes unconnected to any of their neighbors.

Table of values

List of values