A288531 - cp's OEIS frontend

A288531 Triangle read by rows in reverse order: 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	3
5	1
6	4
7	4
8	2
9	5
10	6
11	5
12	6
13	1
14	3
15	2
16	6
17	4
18	2
19	5
20	7
21	8
22	7
23	5
24	3
25	1
26	4
27	9
28	10
29	8
30	9
31	10
32	2
33	5
34	6
35	11
36	7
37	9
38	7
39	6
40	4
41	1
42	3
43	8
44	10
45	12
46	10
47	8
48	11
49	12
50	3
51	7
52	9
53	13
54	4
55	5
56	11
57	12
58	7
59	9
60	8
61	1
62	13
63	14
64	15
65	6
66	16
67	12
68	10
69	8
70	11
71	6
72	2
73	7
74	9
75	16
76	17
77	13
78	14
79	13
80	11
81	9
82	7
83	10
84	4
85	1
86	12
87	6
88	8
89	14
90	15
91	17

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

cp's OEIS Frontend

A288531 Triangle read by rows in reverse order: 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	3
5	1
6	4
7	4
8	2
9	5
10	6
11	5
12	6
13	1
14	3
15	2
16	6
17	4
18	2
19	5
20	7
21	8
22	7
23	5
24	3
25	1
26	4
27	9
28	10
29	8
30	9
31	10
32	2
33	5
34	6
35	11
36	7
37	9
38	7
39	6
40	4
41	1
42	3
43	8
44	10
45	12
46	10
47	8
48	11
49	12
50	3
51	7
52	9
53	13
54	4
55	5
56	11
57	12
58	7
59	9
60	8
61	1
62	13
63	14
64	15
65	6
66	16
67	12
68	10
69	8
70	11
71	6
72	2
73	7
74	9
75	16
76	17
77	13
78	14
79	13
80	11
81	9
82	7
83	10
84	4
85	1
86	12
87	6
88	8
89	14
90	15
91	17

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

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