A227263 - cp's OEIS frontend

A227263 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 two 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	9
6	4
7	5
8	23
9	23
10	5
11	6
12	50
13	98
14	50
15	6
16	7
17	96
18	353
19	353
20	96
21	7
22	8
23	168
24	1111
25	2201
26	1111
27	168
28	8
29	9
30	274
31	3136
32	11932
33	11932
34	3136
35	274
36	9
37	10
38	423
39	8065
40	57146
41	112349
42	57146
43	8065
44	423
45	10
46	11
47	625
48	19146
49	244818
50	937865
51	937865
52	244818
53	19146
54	625
55	11

[2, 3, 3, 4, 9, 4, 5, 23, 23, 5, 6, 50, 98, 50, 6, 7, 96, 353, 353, 96, 7, 8, 168, 1111, 2201, 1111, 168, 8, 9, 274, 3136, 11932, 11932, 3136, 274, 9, 10, 423, 8065, 57146, 112349, 57146, 8065, 423, 10, 11, 625, 19146, 244818, 937865, 937865, 244818, 19146, 625, 11]

cp's OEIS Frontend

A227263 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 two or less, with rows and columns of the latter in lexicographically nondecreasing order.

Table of values

List of values