A308498 - cp's OEIS frontend

A308498 Triangle read by rows where T(n,k), n>=1, 1<=k<=n is the number of (0,1)-matrices of size n with the first row and column sum = k and remaining sums = 1.

n	a(n)
1	1
2	2
3	1
4	6
5	5
6	1
7	24
8	27
9	10
10	1
11	120
12	168
13	88
14	17
15	1
16	720
17	1200
18	800
19	225
20	26
21	1
22	5040
23	9720
24	7800
25	2850
26	486
27	37
28	1
29	40320
30	88200
31	82320
32	36750
33	8232
34	931
35	50
36	1
37	362880
38	887040
39	940800
40	493920
41	136416
42	20384
43	1632
44	65
45	1
46	3628800
47	9797760
48	11612160
49	6985440

[1, 2, 1, 6, 5, 1, 24, 27, 10, 1, 120, 168, 88, 17, 1, 720, 1200, 800, 225, 26, 1, 5040, 9720, 7800, 2850, 486, 37, 1, 40320, 88200, 82320, 36750, 8232, 931, 50, 1, 362880, 887040, 940800, 493920, 136416, 20384, 1632, 65, 1, 3628800, 9797760, 11612160, 6985440]

cp's OEIS Frontend

A308498 Triangle read by rows where T(n,k), n>=1, 1<=k<=n is the number of (0,1)-matrices of size n with the first row and column sum = k and remaining sums = 1.

Table of values

List of values