A227385 - cp's OEIS frontend

A227385 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, with rows and columns of the latter in lexicographically nondecreasing order.

n	a(n)
1	2
2	3
3	3
4	4
5	7
6	4
7	5
8	15
9	15
10	5
11	6
12	30
13	54
14	30
15	6
16	7
17	56
18	185
19	185
20	56
21	7
22	8
23	98
24	587
25	1104
26	587
27	98
28	8
29	9
30	162
31	1704
32	6160
33	6160
34	1704
35	162
36	9
37	10
38	255
39	4532
40	31073
41	61127
42	31073
43	4532
44	255
45	10
46	11
47	385
48	11126
49	141192
50	550010
51	550010
52	141192
53	11126
54	385
55	11
56	12
57	561

[2, 3, 3, 4, 7, 4, 5, 15, 15, 5, 6, 30, 54, 30, 6, 7, 56, 185, 185, 56, 7, 8, 98, 587, 1104, 587, 98, 8, 9, 162, 1704, 6160, 6160, 1704, 162, 9, 10, 255, 4532, 31073, 61127, 31073, 4532, 255, 10, 11, 385, 11126, 141192, 550010, 550010, 141192, 11126, 385, 11, 12, 561]

cp's OEIS Frontend

A227385 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, with rows and columns of the latter in lexicographically nondecreasing order.

Table of values

List of values