A140130 - cp's OEIS frontend

A140130 a(n) = denominator(c(n)) where c(n) = 1 if n=1, otherwise if n < 3*2^floor(log_2(n)-1) then c(n) = (c(floor(n/2))+c(floor((n+1)/2)))/2 otherwise c(n) = c(n-2^floor(log_2(n)))+1.

n	a(n)
1	1
2	1
3	1
4	1
5	2
6	1
7	1
8	1
9	4
10	2
11	4
12	1
13	2
14	1
15	1
16	1
17	8
18	4
19	8
20	2
21	8
22	4
23	8
24	1
25	4
26	2
27	4
28	1
29	2
30	1
31	1
32	1
33	16
34	8
35	16
36	4
37	16
38	8
39	16
40	2
41	16
42	8
43	16
44	4
45	16
46	8
47	16
48	1
49	8
50	4
51	8
52	2
53	8
54	4
55	8
56	1
57	4
58	2
59	4
60	1
61	2
62	1
63	1
64	1
65	32
66	16
67	32
68	8
69	32
70	16
71	32
72	4
73	32
74	16
75	32
76	8
77	32
78	16
79	32
80	2
81	32
82	16
83	32
84	8
85	32
86	16
87	32
88	4
89	32
90	16

[1, 1, 1, 1, 2, 1, 1, 1, 4, 2, 4, 1, 2, 1, 1, 1, 8, 4, 8, 2, 8, 4, 8, 1, 4, 2, 4, 1, 2, 1, 1, 1, 16, 8, 16, 4, 16, 8, 16, 2, 16, 8, 16, 4, 16, 8, 16, 1, 8, 4, 8, 2, 8, 4, 8, 1, 4, 2, 4, 1, 2, 1, 1, 1, 32, 16, 32, 8, 32, 16, 32, 4, 32, 16, 32, 8, 32, 16, 32, 2, 32, 16, 32, 8, 32, 16, 32, 4, 32, 16]

cp's OEIS Frontend

A140130 a(n) = denominator(c(n)) where c(n) = 1 if n=1, otherwise if n < 3*2^floor(log_2(n)-1) then c(n) = (c(floor(n/2))+c(floor((n+1)/2)))/2 otherwise c(n) = c(n-2^floor(log_2(n)))+1.

Table of values

List of values

n	a(n)
1	1
2	1
3	1
4	1
5	2
6	1
7	1
8	1
9	4
10	2
11	4
12	1
13	2
14	1
15	1
16	1
17	8
18	4
19	8
20	2
21	8
22	4
23	8
24	1
25	4
26	2
27	4
28	1
29	2
30	1
31	1
32	1
33	16
34	8
35	16
36	4
37	16
38	8
39	16
40	2
41	16
42	8
43	16
44	4
45	16
46	8
47	16
48	1
49	8
50	4
51	8
52	2
53	8
54	4
55	8
56	1
57	4
58	2
59	4
60	1
61	2
62	1
63	1
64	1
65	32
66	16
67	32
68	8
69	32
70	16
71	32
72	4
73	32
74	16
75	32
76	8
77	32
78	16
79	32
80	2
81	32
82	16
83	32
84	8
85	32
86	16
87	32
88	4
89	32
90	16

n	a(n)
1	1
2	1
3	1
4	1
5	2
6	1
7	1
8	1
9	4
10	2
11	4
12	1
13	2
14	1
15	1
16	1
17	8
18	4
19	8
20	2
21	8
22	4
23	8
24	1
25	4
26	2
27	4
28	1
29	2
30	1
31	1
32	1
33	16
34	8
35	16
36	4
37	16
38	8
39	16
40	2
41	16
42	8
43	16
44	4
45	16
46	8
47	16
48	1
49	8
50	4
51	8
52	2
53	8
54	4
55	8
56	1
57	4
58	2
59	4
60	1
61	2
62	1
63	1
64	1
65	32
66	16
67	32
68	8
69	32
70	16
71	32
72	4
73	32
74	16
75	32
76	8
77	32
78	16
79	32
80	2
81	32
82	16
83	32
84	8
85	32
86	16
87	32
88	4
89	32
90	16

n	a(n)
1	1
2	1
3	1
4	1
5	2
6	1
7	1
8	1
9	4
10	2
11	4
12	1
13	2
14	1
15	1
16	1
17	8
18	4
19	8
20	2
21	8
22	4
23	8
24	1
25	4
26	2
27	4
28	1
29	2
30	1
31	1
32	1
33	16
34	8
35	16
36	4
37	16
38	8
39	16
40	2
41	16
42	8
43	16
44	4
45	16
46	8
47	16
48	1
49	8
50	4
51	8
52	2
53	8
54	4
55	8
56	1
57	4
58	2
59	4
60	1
61	2
62	1
63	1
64	1
65	32
66	16
67	32
68	8
69	32
70	16
71	32
72	4
73	32
74	16
75	32
76	8
77	32
78	16
79	32
80	2
81	32
82	16
83	32
84	8
85	32
86	16
87	32
88	4
89	32
90	16