A292673 - cp's OEIS frontend

A292673 Least number of symbols required to fill a grid of size n X n row by row in the greedy way such that in any row or column or rectangular 3 X 3 block no symbol occurs twice.

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

[1, 4, 9, 11, 13, 13, 13, 13, 14, 14, 15, 17, 18, 21, 22, 23, 25, 26, 27, 29, 30, 31, 32, 34, 35, 38, 39, 40, 42, 45, 47, 49, 51, 53, 54, 55, 55, 55, 58, 59, 60, 61, 62, 63, 64, 65, 66, 67, 68, 69, 71, 72, 74, 76, 78, 79, 83, 83, 85, 86, 88, 90, 91, 92, 93, 96]

cp's OEIS Frontend

A292673 Least number of symbols required to fill a grid of size n X n row by row in the greedy way such that in any row or column or rectangular 3 X 3 block no symbol occurs twice.

Table of values

List of values

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

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

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