A331363 - cp's OEIS frontend

A331363 Pairs of coordinates of the corners in a counterclockwise triangular spiral.

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

[0, 0, 1, 0, 0, 1, -2, -1, 3, -1, 0, 2, -4, -2, 5, -2, 0, 3, -6, -3, 7, -3, 0, 4, -8, -4, 9, -4, 0, 5, -10, -5, 11, -5, 0, 6, -12, -6, 13, -6, 0, 7, -14, -7, 15, -7, 0, 8, -16, -8, 17, -8, 0, 9, -18, -9, 19, -9, 0, 10, -20, -10, 21, -10, 0, 11]

cp's OEIS Frontend

A331363 Pairs of coordinates of the corners in a counterclockwise triangular spiral.

Table of values

List of values

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

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

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