A286297 - cp's OEIS frontend

A286297 Irregular triangle read by rows: successive rows have lengths 1,3,5,7,..., and are filled in across rows with the smallest nonnegative number such that there is no repeat in any row, column, or diagonal of slope +-1.

n	a(n)
0	0
1	1
2	2
3	3
4	2
5	0
6	4
7	1
8	5
9	3
10	1
11	5
12	6
13	0
14	4
15	2
16	4
17	5
18	0
19	2
20	1
21	7
22	3
23	6
24	8
25	5
26	3
27	1
28	4
29	6
30	8
31	9
32	2
33	7
34	0
35	10
36	6
37	4
38	2
39	0
40	3
41	9
42	5
43	10
44	11
45	1
46	12
47	7
48	13
49	7
50	8
51	9
52	5
53	4
54	6
55	10
56	3
57	2
58	12
59	0
60	11
61	14
62	15
63	1
64	8
65	6
66	10
67	3
68	7
69	2
70	11
71	4
72	9
73	13
74	1
75	5
76	15
77	12
78	16
79	14
80	17

[0, 1, 2, 3, 2, 0, 4, 1, 5, 3, 1, 5, 6, 0, 4, 2, 4, 5, 0, 2, 1, 7, 3, 6, 8, 5, 3, 1, 4, 6, 8, 9, 2, 7, 0, 10, 6, 4, 2, 0, 3, 9, 5, 10, 11, 1, 12, 7, 13, 7, 8, 9, 5, 4, 6, 10, 3, 2, 12, 0, 11, 14, 15, 1, 8, 6, 10, 3, 7, 2, 11, 4, 9, 13, 1, 5, 15, 12, 16, 14, 17]

cp's OEIS Frontend

A286297 Irregular triangle read by rows: successive rows have lengths 1,3,5,7,..., and are filled in across rows with the smallest nonnegative number such that there is no repeat in any row, column, or diagonal of slope +-1.

Table of values

List of values

n	a(n)
0	0
1	1
2	2
3	3
4	2
5	0
6	4
7	1
8	5
9	3
10	1
11	5
12	6
13	0
14	4
15	2
16	4
17	5
18	0
19	2
20	1
21	7
22	3
23	6
24	8
25	5
26	3
27	1
28	4
29	6
30	8
31	9
32	2
33	7
34	0
35	10
36	6
37	4
38	2
39	0
40	3
41	9
42	5
43	10
44	11
45	1
46	12
47	7
48	13
49	7
50	8
51	9
52	5
53	4
54	6
55	10
56	3
57	2
58	12
59	0
60	11
61	14
62	15
63	1
64	8
65	6
66	10
67	3
68	7
69	2
70	11
71	4
72	9
73	13
74	1
75	5
76	15
77	12
78	16
79	14
80	17

n	a(n)
0	0
1	1
2	2
3	3
4	2
5	0
6	4
7	1
8	5
9	3
10	1
11	5
12	6
13	0
14	4
15	2
16	4
17	5
18	0
19	2
20	1
21	7
22	3
23	6
24	8
25	5
26	3
27	1
28	4
29	6
30	8
31	9
32	2
33	7
34	0
35	10
36	6
37	4
38	2
39	0
40	3
41	9
42	5
43	10
44	11
45	1
46	12
47	7
48	13
49	7
50	8
51	9
52	5
53	4
54	6
55	10
56	3
57	2
58	12
59	0
60	11
61	14
62	15
63	1
64	8
65	6
66	10
67	3
68	7
69	2
70	11
71	4
72	9
73	13
74	1
75	5
76	15
77	12
78	16
79	14
80	17

n	a(n)
0	0
1	1
2	2
3	3
4	2
5	0
6	4
7	1
8	5
9	3
10	1
11	5
12	6
13	0
14	4
15	2
16	4
17	5
18	0
19	2
20	1
21	7
22	3
23	6
24	8
25	5
26	3
27	1
28	4
29	6
30	8
31	9
32	2
33	7
34	0
35	10
36	6
37	4
38	2
39	0
40	3
41	9
42	5
43	10
44	11
45	1
46	12
47	7
48	13
49	7
50	8
51	9
52	5
53	4
54	6
55	10
56	3
57	2
58	12
59	0
60	11
61	14
62	15
63	1
64	8
65	6
66	10
67	3
68	7
69	2
70	11
71	4
72	9
73	13
74	1
75	5
76	15
77	12
78	16
79	14
80	17