A227165 - cp's OEIS frontend

A227165 T(n,k)=Number of nXk 0,1 arrays indicating 2X2 subblocks of some larger (n+1)X(k+1) binary array having a sum of one or less, with rows and columns of the latter in lexicographically nondecreasing order.

n	a(n)
1	2
2	3
3	3
4	4
5	8
6	4
7	5
8	18
9	18
10	5
11	6
12	36
13	62
14	36
15	6
16	7
17	66
18	193
19	193
20	66
21	7
22	8
23	113
24	558
25	944
26	558
27	113
28	8
29	9
30	183
31	1507
32	4528
33	4528
34	1507
35	183
36	9
37	10
38	283
39	3828
40	20336
41	37012
42	20336
43	3828
44	283
45	10
46	11
47	421
48	9149
49	85018
50	283430
51	283430
52	85018
53	9149
54	421
55	11
56	12
57	606

[2, 3, 3, 4, 8, 4, 5, 18, 18, 5, 6, 36, 62, 36, 6, 7, 66, 193, 193, 66, 7, 8, 113, 558, 944, 558, 113, 8, 9, 183, 1507, 4528, 4528, 1507, 183, 9, 10, 283, 3828, 20336, 37012, 20336, 3828, 283, 10, 11, 421, 9149, 85018, 283430, 283430, 85018, 9149, 421, 11, 12, 606]

cp's OEIS Frontend

A227165 T(n,k)=Number of nXk 0,1 arrays indicating 2X2 subblocks of some larger (n+1)X(k+1) binary array having a sum of one or less, with rows and columns of the latter in lexicographically nondecreasing order.

Table of values

List of values