A281426 - cp's OEIS frontend

A281426 Numerator of n-th term of sequence (or tree) S of all rational numbers generated by these rules: 0 is in S; if x is in S then x + 1 is in S, and if x + 1 is nonzero, then -1/(x + 1) is in S; duplicates are deleted as they occur.

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

[0, 1, -1, 2, -1, 3, -1, 1, -2, 4, -1, 2, -3, 3, -2, 5, -1, 3, -4, 5, -3, 5, -2, 1, -3, 6, -1, 4, -5, 7, -4, 8, -3, 2, -5, 7, -2, 3, -5, 4, -3, 7, -1, 5, -6, 9, -5, 11, -4, 3, -7, 11, -3, 5, -8, 7, -5, 9, -2, 5, -7, 8, -5, 7, -3, 1, -4, 8, -1, 6, -7, 11, -6, 14]

cp's OEIS Frontend

A281426 Numerator of n-th term of sequence (or tree) S of all rational numbers generated by these rules: 0 is in S; if x is in S then x + 1 is in S, and if x + 1 is nonzero, then -1/(x + 1) is in S; duplicates are deleted as they occur.

Table of values

List of values

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

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

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