A181236 - cp's OEIS frontend

A181236 T(n,k)=Number of (k*n)Xn binary matrices with all row sums equal and all column sums equal.

n	a(n)
1	2
2	2
3	4
4	2
5	8
6	14
7	2
8	22
9	182
10	140
11	2
12	72
13	3362
14	49772
15	4322
16	2
17	254
18	69302
19	33235358
20	113400002
21	434542
22	2
23	926
24	1513514
25	27896484332
26	5210265060002
27	4027811102702
28	144109562
29	2
30	3434
31	34306274
32	26012734507190
33	298289608088472002

[2, 2, 4, 2, 8, 14, 2, 22, 182, 140, 2, 72, 3362, 49772, 4322, 2, 254, 69302, 33235358, 113400002, 434542, 2, 926, 1513514, 27896484332, 5210265060002, 4027811102702, 144109562, 2, 3434, 34306274, 26012734507190, 298289608088472002]

cp's OEIS Frontend

A181236 T(n,k)=Number of (k*n)Xn binary matrices with all row sums equal and all column sums equal.

Table of values

List of values