A065675 - cp's OEIS frontend

A065675 The exponent of 2 in the fractions of the range ]0,1[ Stern-Brocot tree (A007305/A007306) [1/2, 1/3, 2/3, 1/4, 2/5, 3/5, 3/4, 1/5, 2/7, 3/8, 3/7, 4/7, 5/8, 5/7, 4/5, ...].

n	a(n)
1	-1
2	0
3	1
4	-2
5	1
6	0
7	-2
8	0
9	1
10	-3
11	0
12	2
13	-3
14	0
15	2
16	-1
17	1
18	0
19	-1
20	2
21	0
22	-2
23	2
24	0
25	-2
26	3
27	0
28	-1
29	3
30	0
31	-1
32	0
33	1
34	-1
35	0
36	2
37	-1
38	0
39	2
40	-1
41	0
42	3
43	-1
44	0
45	3
46	-4
47	0
48	1
49	-4
50	0
51	1
52	-1
53	0
54	2
55	-1
56	0
57	2
58	-1
59	0
60	1
61	-1
62	0
63	1
64	-3
65	1
66	0
67	-4
68	2
69	0
70	-1
71	2
72	0
73	-1
74	3
75	0
76	-3
77	3
78	0
79	-4
80	1
81	0
82	-1
83	1
84	0
85	-1
86	2
87	0
88	-1
89	2
90	0
91	-1
92	1
93	0
94	-2
95	1
96	0
97	-2
98	1
99	0
100	-1
101	1
102	0
103	-1
104	1
105	0
106	-1
107	1
108	0

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

cp's OEIS Frontend

A065675 The exponent of 2 in the fractions of the range ]0,1[ Stern-Brocot tree (A007305/A007306) [1/2, 1/3, 2/3, 1/4, 2/5, 3/5, 3/4, 1/5, 2/7, 3/8, 3/7, 4/7, 5/8, 5/7, 4/5, ...].

Table of values

List of values

n	a(n)
1	-1
2	0
3	1
4	-2
5	1
6	0
7	-2
8	0
9	1
10	-3
11	0
12	2
13	-3
14	0
15	2
16	-1
17	1
18	0
19	-1
20	2
21	0
22	-2
23	2
24	0
25	-2
26	3
27	0
28	-1
29	3
30	0
31	-1
32	0
33	1
34	-1
35	0
36	2
37	-1
38	0
39	2
40	-1
41	0
42	3
43	-1
44	0
45	3
46	-4
47	0
48	1
49	-4
50	0
51	1
52	-1
53	0
54	2
55	-1
56	0
57	2
58	-1
59	0
60	1
61	-1
62	0
63	1
64	-3
65	1
66	0
67	-4
68	2
69	0
70	-1
71	2
72	0
73	-1
74	3
75	0
76	-3
77	3
78	0
79	-4
80	1
81	0
82	-1
83	1
84	0
85	-1
86	2
87	0
88	-1
89	2
90	0
91	-1
92	1
93	0
94	-2
95	1
96	0
97	-2
98	1
99	0
100	-1
101	1
102	0
103	-1
104	1
105	0
106	-1
107	1
108	0

n	a(n)
1	-1
2	0
3	1
4	-2
5	1
6	0
7	-2
8	0
9	1
10	-3
11	0
12	2
13	-3
14	0
15	2
16	-1
17	1
18	0
19	-1
20	2
21	0
22	-2
23	2
24	0
25	-2
26	3
27	0
28	-1
29	3
30	0
31	-1
32	0
33	1
34	-1
35	0
36	2
37	-1
38	0
39	2
40	-1
41	0
42	3
43	-1
44	0
45	3
46	-4
47	0
48	1
49	-4
50	0
51	1
52	-1
53	0
54	2
55	-1
56	0
57	2
58	-1
59	0
60	1
61	-1
62	0
63	1
64	-3
65	1
66	0
67	-4
68	2
69	0
70	-1
71	2
72	0
73	-1
74	3
75	0
76	-3
77	3
78	0
79	-4
80	1
81	0
82	-1
83	1
84	0
85	-1
86	2
87	0
88	-1
89	2
90	0
91	-1
92	1
93	0
94	-2
95	1
96	0
97	-2
98	1
99	0
100	-1
101	1
102	0
103	-1
104	1
105	0
106	-1
107	1
108	0

n	a(n)
1	-1
2	0
3	1
4	-2
5	1
6	0
7	-2
8	0
9	1
10	-3
11	0
12	2
13	-3
14	0
15	2
16	-1
17	1
18	0
19	-1
20	2
21	0
22	-2
23	2
24	0
25	-2
26	3
27	0
28	-1
29	3
30	0
31	-1
32	0
33	1
34	-1
35	0
36	2
37	-1
38	0
39	2
40	-1
41	0
42	3
43	-1
44	0
45	3
46	-4
47	0
48	1
49	-4
50	0
51	1
52	-1
53	0
54	2
55	-1
56	0
57	2
58	-1
59	0
60	1
61	-1
62	0
63	1
64	-3
65	1
66	0
67	-4
68	2
69	0
70	-1
71	2
72	0
73	-1
74	3
75	0
76	-3
77	3
78	0
79	-4
80	1
81	0
82	-1
83	1
84	0
85	-1
86	2
87	0
88	-1
89	2
90	0
91	-1
92	1
93	0
94	-2
95	1
96	0
97	-2
98	1
99	0
100	-1
101	1
102	0
103	-1
104	1
105	0
106	-1
107	1
108	0