A290724 - cp's OEIS frontend

A290724 Triangle read by rows: T(n,k) = number of arrangements of k non-attacking rooks on an n X n right triangular board with every square controlled by at least one rook.

n	a(n)
1	1
2	1
3	1
4	0
5	4
6	1
7	0
8	2
9	11
10	1
11	0
12	0
13	18
14	26
15	1
16	0
17	0
18	6
19	100
20	57
21	1
22	0
23	0
24	0
25	96
26	444
27	120
28	1
29	0
30	0
31	0
32	24
33	900
34	1734
35	247
36	1
37	0
38	0
39	0
40	0
41	600
42	6480
43	6246
44	502
45	1
46	0
47	0
48	0
49	0
50	120
51	8520
52	39762
53	21320
54	1013
55	1
56	0
57	0
58	0
59	0
60	0
61	4320
62	90600
63	219312
64	70128
65	2036
66	1

[1, 1, 1, 0, 4, 1, 0, 2, 11, 1, 0, 0, 18, 26, 1, 0, 0, 6, 100, 57, 1, 0, 0, 0, 96, 444, 120, 1, 0, 0, 0, 24, 900, 1734, 247, 1, 0, 0, 0, 0, 600, 6480, 6246, 502, 1, 0, 0, 0, 0, 120, 8520, 39762, 21320, 1013, 1, 0, 0, 0, 0, 0, 4320, 90600, 219312, 70128, 2036, 1]

cp's OEIS Frontend

A290724 Triangle read by rows: T(n,k) = number of arrangements of k non-attacking rooks on an n X n right triangular board with every square controlled by at least one rook.

Table of values

List of values