A065676 - cp's OEIS frontend

A065676 The exponent of 2 in the fractions of the whole ]0, inf[ Stern-Brocot tree (A007305/A047679) [1/1, 1/2, 2/1, 1/3, 2/3, 3/2, 3/1, 1/4, 2/5, 3/5, 3/4, 4/3, 5/3, 5/2, 4/1, ...].

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

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

cp's OEIS Frontend

A065676 The exponent of 2 in the fractions of the whole ]0, inf[ Stern-Brocot tree (A007305/A047679) [1/1, 1/2, 2/1, 1/3, 2/3, 3/2, 3/1, 1/4, 2/5, 3/5, 3/4, 4/3, 5/3, 5/2, 4/1, ...].

Table of values

List of values

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

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

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