A227061 - cp's OEIS frontend

A227061 T(n,k) = Number of (n+k-1) X (n+k-1) binary arrays with k 1s in every row and column with rows and columns in lexicographically nondecreasing order.

n	a(n)
1	1
2	1
3	1
4	1
5	1
6	1
7	1
8	1
9	2
10	1
11	1
12	1
13	3
14	5
15	1
16	1
17	1
18	5
19	25
20	13
21	1
22	1
23	1
24	8
25	161
26	272
27	42
28	1
29	1
30	1
31	13
32	1112
33	7776
34	4070
35	155
36	1
37	1
38	1
39	21
40	8787
41	287311
42	626649
43	79221
44	636
45	1
46	1
47	1
48	34
49	76156
50	13704640
51	137393147
52	70821384
53	1906501
54	2889
55	1
56	1
57	1
58	55
59	728699
60	809171699

[1, 1, 1, 1, 1, 1, 1, 1, 2, 1, 1, 1, 3, 5, 1, 1, 1, 5, 25, 13, 1, 1, 1, 8, 161, 272, 42, 1, 1, 1, 13, 1112, 7776, 4070, 155, 1, 1, 1, 21, 8787, 287311, 626649, 79221, 636, 1, 1, 1, 34, 76156, 13704640, 137393147, 70821384, 1906501, 2889, 1, 1, 1, 55, 728699, 809171699]

cp's OEIS Frontend

A227061 T(n,k) = Number of (n+k-1) X (n+k-1) binary arrays with k 1s in every row and column with rows and columns in lexicographically nondecreasing order.

Table of values

List of values