A292672 - cp's OEIS frontend

A292672 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 2 X 2 block no symbol occurs twice.

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

[1, 4, 6, 6, 7, 8, 10, 10, 13, 15, 16, 17, 19, 20, 21, 22, 23, 25, 28, 30, 31, 32, 33, 35, 35, 37, 38, 39, 40, 41, 43, 44, 45, 47, 50, 52, 53, 55, 57, 58, 60, 60, 61, 63, 64, 65, 67, 68, 70, 71, 72, 73, 74, 76, 78, 78, 79, 80, 82, 84, 85, 87, 89, 90, 92, 93, 94]

cp's OEIS Frontend

A292672 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 2 X 2 block no symbol occurs twice.

Table of values

List of values

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

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

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