A194498 - cp's OEIS frontend

A194498 T(n,k)=Number of ways to arrange k nonattacking queens on the lower triangle of an n X n board.

n	a(n)
1	1
2	0
3	3
4	0
5	0
6	6
7	0
8	0
9	2
10	10
11	0
12	0
13	0
14	12
15	15
16	0
17	0
18	0
19	0
20	38
21	21
22	0
23	0
24	0
25	0
26	12
27	92
28	28
29	0
30	0
31	0
32	0
33	0
34	82
35	188
36	36
37	0
38	0
39	0
40	0
41	0
42	8
43	330
44	344
45	45
46	0
47	0
48	0
49	0
50	0
51	0
52	118
53	1008
54	580
55	55
56	0
57	0
58	0
59	0
60	0
61	0
62	4
63	802
64	2566
65	920
66	66
67	0
68	0
69	0
70	0
71	0
72	0
73	0
74	114
75	3708
76	5742
77	1390
78	78
79	0
80	0
81	0
82	0
83	0
84	0
85	0

[1, 0, 3, 0, 0, 6, 0, 0, 2, 10, 0, 0, 0, 12, 15, 0, 0, 0, 0, 38, 21, 0, 0, 0, 0, 12, 92, 28, 0, 0, 0, 0, 0, 82, 188, 36, 0, 0, 0, 0, 0, 8, 330, 344, 45, 0, 0, 0, 0, 0, 0, 118, 1008, 580, 55, 0, 0, 0, 0, 0, 0, 4, 802, 2566, 920, 66, 0, 0, 0, 0, 0, 0, 0, 114, 3708, 5742, 1390, 78, 0, 0, 0, 0, 0, 0, 0]

cp's OEIS Frontend

A194498 T(n,k)=Number of ways to arrange k nonattacking queens on the lower triangle of an n X n board.

Table of values

List of values