A225982 - cp's OEIS frontend

A225982 T(n,k)=Number of nXk binary arrays whose sum with another nXk binary array containing no more than two 1s has rows and columns in lexicographically nondecreasing order.

n	a(n)
1	2
2	4
3	4
4	8
5	15
6	8
7	15
8	48
9	48
10	15
11	26
12	138
13	252
14	138
15	26
16	42
17	350
18	1178
19	1178
20	350
21	42
22	64
23	790
24	4722
25	9113
26	4722
27	790
28	64
29	93
30	1616
31	16361
32	61808
33	61808
34	16361
35	1616
36	93
37	130
38	3049
39	49811
40	361361
41	737893
42	361361
43	49811
44	3049
45	130
46	176
47	5384
48	135672
49	1825607

[2, 4, 4, 8, 15, 8, 15, 48, 48, 15, 26, 138, 252, 138, 26, 42, 350, 1178, 1178, 350, 42, 64, 790, 4722, 9113, 4722, 790, 64, 93, 1616, 16361, 61808, 61808, 16361, 1616, 93, 130, 3049, 49811, 361361, 737893, 361361, 49811, 3049, 130, 176, 5384, 135672, 1825607]

cp's OEIS Frontend

A225982 T(n,k)=Number of nXk binary arrays whose sum with another nXk binary array containing no more than two 1s has rows and columns in lexicographically nondecreasing order.

Table of values

List of values