A274947 - cp's OEIS frontend

A274947 Irregular triangle read by rows: T(n,k) (n>=0, 0 <= k <= n^2) = least number of squares attacked by k queens on an n X n board.

n	a(n)
0	0
1	0
2	1
3	0
4	4
5	4
6	4
7	4
8	0
9	7
10	8
11	9
12	9
13	9
14	9
15	9
16	9
17	9
18	0
19	10
20	13
21	14
22	15
23	15
24	15
25	16
26	16
27	16
28	16
29	16
30	16
31	16
32	16
33	16
34	16
35	0
36	13
37	18
38	20
39	21
40	22
41	23
42	23
43	24
44	24
45	24
46	24
47	24
48	25
49	25
50	25
51	25
52	25
53	25
54	25
55	25
56	25
57	25
58	25
59	25
60	25
61	0
62	16
63	23
64	27
65	28
66	30
67	31
68	32
69	32
70	33
71	34
72	34
73	34
74	34
75	35
76	35
77	35
78	35
79	35
80	35
81	35
82	36
83	36
84	36
85	36
86	36
87	36
88	36
89	36
90	36
91	36
92	36
93	36
94	36
95	36
96	36
97	36

[0, 0, 1, 0, 4, 4, 4, 4, 0, 7, 8, 9, 9, 9, 9, 9, 9, 9, 0, 10, 13, 14, 15, 15, 15, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 0, 13, 18, 20, 21, 22, 23, 23, 24, 24, 24, 24, 24, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 0, 16, 23, 27, 28, 30, 31, 32, 32, 33, 34, 34, 34, 34, 35, 35, 35, 35, 35, 35, 35, 36, 36, 36, 36, 36, 36, 36, 36, 36, 36, 36, 36, 36, 36, 36, 36]

cp's OEIS Frontend

A274947 Irregular triangle read by rows: T(n,k) (n>=0, 0 <= k <= n^2) = least number of squares attacked by k queens on an n X n board.

Table of values

List of values

n	a(n)
0	0
1	0
2	1
3	0
4	4
5	4
6	4
7	4
8	0
9	7
10	8
11	9
12	9
13	9
14	9
15	9
16	9
17	9
18	0
19	10
20	13
21	14
22	15
23	15
24	15
25	16
26	16
27	16
28	16
29	16
30	16
31	16
32	16
33	16
34	16
35	0
36	13
37	18
38	20
39	21
40	22
41	23
42	23
43	24
44	24
45	24
46	24
47	24
48	25
49	25
50	25
51	25
52	25
53	25
54	25
55	25
56	25
57	25
58	25
59	25
60	25
61	0
62	16
63	23
64	27
65	28
66	30
67	31
68	32
69	32
70	33
71	34
72	34
73	34
74	34
75	35
76	35
77	35
78	35
79	35
80	35
81	35
82	36
83	36
84	36
85	36
86	36
87	36
88	36
89	36
90	36
91	36
92	36
93	36
94	36
95	36
96	36
97	36

n	a(n)
0	0
1	0
2	1
3	0
4	4
5	4
6	4
7	4
8	0
9	7
10	8
11	9
12	9
13	9
14	9
15	9
16	9
17	9
18	0
19	10
20	13
21	14
22	15
23	15
24	15
25	16
26	16
27	16
28	16
29	16
30	16
31	16
32	16
33	16
34	16
35	0
36	13
37	18
38	20
39	21
40	22
41	23
42	23
43	24
44	24
45	24
46	24
47	24
48	25
49	25
50	25
51	25
52	25
53	25
54	25
55	25
56	25
57	25
58	25
59	25
60	25
61	0
62	16
63	23
64	27
65	28
66	30
67	31
68	32
69	32
70	33
71	34
72	34
73	34
74	34
75	35
76	35
77	35
78	35
79	35
80	35
81	35
82	36
83	36
84	36
85	36
86	36
87	36
88	36
89	36
90	36
91	36
92	36
93	36
94	36
95	36
96	36
97	36

n	a(n)
0	0
1	0
2	1
3	0
4	4
5	4
6	4
7	4
8	0
9	7
10	8
11	9
12	9
13	9
14	9
15	9
16	9
17	9
18	0
19	10
20	13
21	14
22	15
23	15
24	15
25	16
26	16
27	16
28	16
29	16
30	16
31	16
32	16
33	16
34	16
35	0
36	13
37	18
38	20
39	21
40	22
41	23
42	23
43	24
44	24
45	24
46	24
47	24
48	25
49	25
50	25
51	25
52	25
53	25
54	25
55	25
56	25
57	25
58	25
59	25
60	25
61	0
62	16
63	23
64	27
65	28
66	30
67	31
68	32
69	32
70	33
71	34
72	34
73	34
74	34
75	35
76	35
77	35
78	35
79	35
80	35
81	35
82	36
83	36
84	36
85	36
86	36
87	36
88	36
89	36
90	36
91	36
92	36
93	36
94	36
95	36
96	36
97	36