A342151 - cp's OEIS frontend

A342151 Maximum number of safe (i.e., not attacked) squares when placing n queens on a standard 8 X 8 chessboard.

n	a(n)
1	42
2	31
3	25
4	24
5	17
6	15
7	13
8	11
9	10
10	9
11	8
12	7
13	7
14	6
15	6
16	5
17	5
18	4
19	4
20	4
21	4
22	4
23	4
24	4
25	3
26	2
27	2
28	2
29	2
30	2
31	2
32	1
33	1
34	1
35	1
36	1
37	1
38	1
39	1
40	1
41	1
42	1
43	0
44	0
45	0
46	0
47	0
48	0
49	0
50	0
51	0
52	0
53	0
54	0
55	0
56	0
57	0
58	0
59	0
60	0
61	0
62	0
63	0

[42, 31, 25, 24, 17, 15, 13, 11, 10, 9, 8, 7, 7, 6, 6, 5, 5, 4, 4, 4, 4, 4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0]

cp's OEIS Frontend

A342151 Maximum number of safe (i.e., not attacked) squares when placing n queens on a standard 8 X 8 chessboard.

Table of values

List of values

n	a(n)
1	42
2	31
3	25
4	24
5	17
6	15
7	13
8	11
9	10
10	9
11	8
12	7
13	7
14	6
15	6
16	5
17	5
18	4
19	4
20	4
21	4
22	4
23	4
24	4
25	3
26	2
27	2
28	2
29	2
30	2
31	2
32	1
33	1
34	1
35	1
36	1
37	1
38	1
39	1
40	1
41	1
42	1
43	0
44	0
45	0
46	0
47	0
48	0
49	0
50	0
51	0
52	0
53	0
54	0
55	0
56	0
57	0
58	0
59	0
60	0
61	0
62	0
63	0

n	a(n)
1	42
2	31
3	25
4	24
5	17
6	15
7	13
8	11
9	10
10	9
11	8
12	7
13	7
14	6
15	6
16	5
17	5
18	4
19	4
20	4
21	4
22	4
23	4
24	4
25	3
26	2
27	2
28	2
29	2
30	2
31	2
32	1
33	1
34	1
35	1
36	1
37	1
38	1
39	1
40	1
41	1
42	1
43	0
44	0
45	0
46	0
47	0
48	0
49	0
50	0
51	0
52	0
53	0
54	0
55	0
56	0
57	0
58	0
59	0
60	0
61	0
62	0
63	0

n	a(n)
1	42
2	31
3	25
4	24
5	17
6	15
7	13
8	11
9	10
10	9
11	8
12	7
13	7
14	6
15	6
16	5
17	5
18	4
19	4
20	4
21	4
22	4
23	4
24	4
25	3
26	2
27	2
28	2
29	2
30	2
31	2
32	1
33	1
34	1
35	1
36	1
37	1
38	1
39	1
40	1
41	1
42	1
43	0
44	0
45	0
46	0
47	0
48	0
49	0
50	0
51	0
52	0
53	0
54	0
55	0
56	0
57	0
58	0
59	0
60	0
61	0
62	0
63	0