A104601 - cp's OEIS frontend

A104601 Triangle T(r,n) read by rows: number of n X n (0,1)-matrices with exactly r entries equal to 1 and no zero row or columns.

n	a(n)
1	1
2	0
3	2
4	0
5	4
6	6
7	0
8	1
9	45
10	24
11	0
12	0
13	90
14	432
15	120
16	0
17	0
18	78
19	2248
20	4200
21	720
22	0
23	0
24	36
25	5776
26	43000
27	43200
28	5040
29	0
30	0
31	9
32	9066
33	222925
34	755100
35	476280
36	40320
37	0
38	0
39	1
40	9696
41	727375
42	6700500
43	13003620
44	5644800
45	362880
46	0
47	0
48	0
49	7480
50	1674840

[1, 0, 2, 0, 4, 6, 0, 1, 45, 24, 0, 0, 90, 432, 120, 0, 0, 78, 2248, 4200, 720, 0, 0, 36, 5776, 43000, 43200, 5040, 0, 0, 9, 9066, 222925, 755100, 476280, 40320, 0, 0, 1, 9696, 727375, 6700500, 13003620, 5644800, 362880, 0, 0, 0, 7480, 1674840]

cp's OEIS Frontend

A104601 Triangle T(r,n) read by rows: number of n X n (0,1)-matrices with exactly r entries equal to 1 and no zero row or columns.

Table of values

List of values