A004718 - cp's OEIS frontend

A004718 The Danish composer Per Nørgård's "infinity sequence", invented in an attempt to unify in a perfect way repetition and variation: a(2n) = -a(n), a(2n+1) = a(n) + 1, a(0) = 0.

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

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

cp's OEIS Frontend

A004718 The Danish composer Per Nørgård's "infinity sequence", invented in an attempt to unify in a perfect way repetition and variation: a(2n) = -a(n), a(2n+1) = a(n) + 1, a(0) = 0.

Table of values

List of values

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

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

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