A337108 - cp's OEIS frontend

A337108 Square spiral constructed by greedy algorithm, so that each diagonal and antidiagonal contains distinct numbers.

n	a(n)
0	0
1	0
2	1
3	1
4	1
5	0
6	2
7	1
8	2
9	2
10	0
11	2
12	3
13	3
14	2
15	3
16	3
17	2
18	0
19	2
20	4
21	3
22	1
23	3
24	4
25	4
26	3
27	0
28	4
29	4
30	5
31	5
32	5
33	1
34	4
35	5
36	5
37	4
38	5
39	0
40	3
41	4
42	6
43	5
44	5
45	1
46	6
47	5
48	6
49	6
50	5
51	6
52	0
53	6
54	3
55	6
56	7
57	7
58	4
59	7
60	1
61	7
62	6
63	7
64	7
65	6
66	3
67	6
68	0
69	6
70	7
71	6
72	8
73	7
74	8
75	7
76	1
77	7
78	4
79	7
80	8
81	8
82	7
83	4
84	2
85	0
86	2

[0, 0, 1, 1, 1, 0, 2, 1, 2, 2, 0, 2, 3, 3, 2, 3, 3, 2, 0, 2, 4, 3, 1, 3, 4, 4, 3, 0, 4, 4, 5, 5, 5, 1, 4, 5, 5, 4, 5, 0, 3, 4, 6, 5, 5, 1, 6, 5, 6, 6, 5, 6, 0, 6, 3, 6, 7, 7, 4, 7, 1, 7, 6, 7, 7, 6, 3, 6, 0, 6, 7, 6, 8, 7, 8, 7, 1, 7, 4, 7, 8, 8, 7, 4, 2, 0, 2]

cp's OEIS Frontend

A337108 Square spiral constructed by greedy algorithm, so that each diagonal and antidiagonal contains distinct numbers.

Table of values

List of values

n	a(n)
0	0
1	0
2	1
3	1
4	1
5	0
6	2
7	1
8	2
9	2
10	0
11	2
12	3
13	3
14	2
15	3
16	3
17	2
18	0
19	2
20	4
21	3
22	1
23	3
24	4
25	4
26	3
27	0
28	4
29	4
30	5
31	5
32	5
33	1
34	4
35	5
36	5
37	4
38	5
39	0
40	3
41	4
42	6
43	5
44	5
45	1
46	6
47	5
48	6
49	6
50	5
51	6
52	0
53	6
54	3
55	6
56	7
57	7
58	4
59	7
60	1
61	7
62	6
63	7
64	7
65	6
66	3
67	6
68	0
69	6
70	7
71	6
72	8
73	7
74	8
75	7
76	1
77	7
78	4
79	7
80	8
81	8
82	7
83	4
84	2
85	0
86	2

n	a(n)
0	0
1	0
2	1
3	1
4	1
5	0
6	2
7	1
8	2
9	2
10	0
11	2
12	3
13	3
14	2
15	3
16	3
17	2
18	0
19	2
20	4
21	3
22	1
23	3
24	4
25	4
26	3
27	0
28	4
29	4
30	5
31	5
32	5
33	1
34	4
35	5
36	5
37	4
38	5
39	0
40	3
41	4
42	6
43	5
44	5
45	1
46	6
47	5
48	6
49	6
50	5
51	6
52	0
53	6
54	3
55	6
56	7
57	7
58	4
59	7
60	1
61	7
62	6
63	7
64	7
65	6
66	3
67	6
68	0
69	6
70	7
71	6
72	8
73	7
74	8
75	7
76	1
77	7
78	4
79	7
80	8
81	8
82	7
83	4
84	2
85	0
86	2

n	a(n)
0	0
1	0
2	1
3	1
4	1
5	0
6	2
7	1
8	2
9	2
10	0
11	2
12	3
13	3
14	2
15	3
16	3
17	2
18	0
19	2
20	4
21	3
22	1
23	3
24	4
25	4
26	3
27	0
28	4
29	4
30	5
31	5
32	5
33	1
34	4
35	5
36	5
37	4
38	5
39	0
40	3
41	4
42	6
43	5
44	5
45	1
46	6
47	5
48	6
49	6
50	5
51	6
52	0
53	6
54	3
55	6
56	7
57	7
58	4
59	7
60	1
61	7
62	6
63	7
64	7
65	6
66	3
67	6
68	0
69	6
70	7
71	6
72	8
73	7
74	8
75	7
76	1
77	7
78	4
79	7
80	8
81	8
82	7
83	4
84	2
85	0
86	2