A380813 - cp's OEIS frontend

A380813 Sequence of y-coordinates of the lexicographically earliest (according to the spiral numbering of the square grid; see comments) infinite Racetrack trajectory (using von Neumann neighborhood) on the square grid.

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

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

cp's OEIS Frontend

A380813 Sequence of y-coordinates of the lexicographically earliest (according to the spiral numbering of the square grid; see comments) infinite Racetrack trajectory (using von Neumann neighborhood) on the square grid.

Table of values

List of values

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

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

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