A335490 - cp's OEIS frontend

A335490 Isosceles triangle read by rows in which each term is the least positive integer satisfying the condition that no row, diagonal, or antidiagonal contains a repeated term.

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

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

cp's OEIS Frontend

A335490 Isosceles triangle read by rows in which each term is the least positive integer satisfying the condition that no row, 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	2
7	4
8	2
9	3
10	5
11	5
12	6
13	1
14	4
15	7
16	6
17	4
18	5
19	7
20	8
21	9
22	7
23	5
24	6
25	1
26	4
27	10
28	8
29	8
30	9
31	4
32	2
33	3
34	5
35	6
36	10
37	9
38	7
39	8
40	3
41	1
42	2
43	10
44	5
45	4
46	10
47	8
48	9
49	6
50	2
51	3
52	7
53	11
54	12
55	13
56	11
57	12
58	7
59	10
60	5
61	1
62	9
63	8
64	6
65	14
66	15
67	12
68	10
69	11
70	13
71	6
72	4
73	14
74	7
75	9
76	8
77	16
78	17
79	13
80	11

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

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