A319284 - cp's OEIS frontend

A319284 The profiles of the backtrack tree for the n queens problem, triangle read by rows.

n	a(n)
0	1
1	1
2	1
3	1
4	2
5	0
6	1
7	3
8	2
9	0
10	1
11	4
12	6
13	4
14	2
15	1
16	5
17	12
18	14
19	12
20	10
21	1
22	6
23	20
24	36
25	46
26	40
27	4
28	1
29	7
30	30
31	76
32	140
33	164
34	94
35	40
36	1
37	8
38	42
39	140
40	344
41	568
42	550
43	312
44	92
45	1
46	9
47	56
48	234
49	732
50	1614
51	2292
52	2038
53	1066
54	352
55	1
56	10
57	72
58	364
59	1400
60	3916
61	7552
62	9632
63	7828
64	4040
65	724
66	1
67	11
68	90
69	536
70	2468
71	8492
72	21362
73	37248
74	44148
75	34774
76	15116
77	2680

[1, 1, 1, 1, 2, 0, 1, 3, 2, 0, 1, 4, 6, 4, 2, 1, 5, 12, 14, 12, 10, 1, 6, 20, 36, 46, 40, 4, 1, 7, 30, 76, 140, 164, 94, 40, 1, 8, 42, 140, 344, 568, 550, 312, 92, 1, 9, 56, 234, 732, 1614, 2292, 2038, 1066, 352, 1, 10, 72, 364, 1400, 3916, 7552, 9632, 7828, 4040, 724, 1, 11, 90, 536, 2468, 8492, 21362, 37248, 44148, 34774, 15116, 2680]

cp's OEIS Frontend

A319284 The profiles of the backtrack tree for the n queens problem, triangle read by rows.

Table of values

List of values