A274651 - cp's OEIS frontend

A274651 Triangle read by rows: T(n,k), (1<=k<=n), in which each term is the least positive integer such that no row, column, diagonal, or antidiagonal contains a repeated term.

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

[1, 2, 3, 4, 1, 2, 3, 5, 4, 6, 6, 2, 1, 3, 4, 5, 4, 6, 2, 7, 8, 7, 8, 3, 1, 6, 5, 9, 9, 6, 10, 5, 8, 3, 11, 7, 8, 11, 9, 4, 1, 7, 10, 6, 5, 12, 7, 13, 8, 2, 9, 4, 11, 10, 14, 10, 9, 5, 12, 3, 1, 2, 13, 7, 8, 11, 11, 12, 8, 13, 5, 4, 3, 10, 9, 15, 14, 16, 13, 10, 11, 7, 9, 2, 1, 12, 8, 5, 17, 15, 18]

cp's OEIS Frontend

A274651 Triangle read by rows: T(n,k), (1<=k<=n), in which each term is the least positive integer such that no row, column, diagonal, or antidiagonal contains a repeated term.

Table of values

List of values

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

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

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