A232890 - cp's OEIS frontend

A232890 Denominator 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	1
2	1
3	1
4	1
5	2
6	1
7	3
8	2
9	1
10	1
11	4
12	3
13	2
14	2
15	3
16	1
17	5
18	4
19	3
20	3
21	5
22	2
23	5
24	3
25	1
26	1
27	6
28	5
29	4
30	4
31	7
32	3
33	8
34	5
35	2
36	2
37	7
38	5
39	3
40	3
41	4
42	1
43	7
44	6
45	5
46	5
47	9
48	4
49	11
50	7
51	3
52	3
53	11
54	8
55	5
56	5
57	7
58	2
59	9
60	7
61	5
62	5
63	8
64	3
65	7
66	4
67	1
68	1
69	8
70	7
71	6
72	6
73	11
74	5
75	14
76	9
77	4
78	4
79	15
80	11
81	7
82	7
83	10
84	3

[1, 1, 1, 1, 2, 1, 3, 2, 1, 1, 4, 3, 2, 2, 3, 1, 5, 4, 3, 3, 5, 2, 5, 3, 1, 1, 6, 5, 4, 4, 7, 3, 8, 5, 2, 2, 7, 5, 3, 3, 4, 1, 7, 6, 5, 5, 9, 4, 11, 7, 3, 3, 11, 8, 5, 5, 7, 2, 9, 7, 5, 5, 8, 3, 7, 4, 1, 1, 8, 7, 6, 6, 11, 5, 14, 9, 4, 4, 15, 11, 7, 7, 10, 3]

cp's OEIS Frontend

A232890 Denominator 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	1
2	1
3	1
4	1
5	2
6	1
7	3
8	2
9	1
10	1
11	4
12	3
13	2
14	2
15	3
16	1
17	5
18	4
19	3
20	3
21	5
22	2
23	5
24	3
25	1
26	1
27	6
28	5
29	4
30	4
31	7
32	3
33	8
34	5
35	2
36	2
37	7
38	5
39	3
40	3
41	4
42	1
43	7
44	6
45	5
46	5
47	9
48	4
49	11
50	7
51	3
52	3
53	11
54	8
55	5
56	5
57	7
58	2
59	9
60	7
61	5
62	5
63	8
64	3
65	7
66	4
67	1
68	1
69	8
70	7
71	6
72	6
73	11
74	5
75	14
76	9
77	4
78	4
79	15
80	11
81	7
82	7
83	10
84	3

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

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