A292674 - cp's OEIS frontend

A292674 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 4 X 4 block no symbol occurs twice.

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

[1, 4, 9, 16, 18, 18, 20, 20, 22, 22, 23, 23, 23, 24, 25, 26, 26, 26, 29, 32, 32, 34, 36, 38, 38, 38, 42, 42, 42, 44, 44, 45, 48, 49, 49, 49, 54, 54, 54, 56, 59, 59, 64, 65, 68, 69, 70, 73, 76, 78, 79, 79, 82, 82, 83, 86, 87, 89, 90, 92, 95, 95, 96, 96, 97, 97]

cp's OEIS Frontend

A292674 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 4 X 4 block no symbol occurs twice.

Table of values

List of values

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

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

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