A025637 - cp's OEIS frontend

A025637 Exponent of 2 (value of i) in n-th number of form 2^i*7^j.

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

[0, 1, 2, 0, 3, 1, 4, 2, 5, 0, 3, 6, 1, 4, 7, 2, 5, 8, 0, 3, 6, 9, 1, 4, 7, 10, 2, 5, 8, 11, 0, 3, 6, 9, 12, 1, 4, 7, 10, 13, 2, 5, 8, 11, 14, 0, 3, 6, 9, 12, 15, 1, 4, 7, 10, 13, 16, 2, 5, 8, 11, 14, 0, 17, 3, 6, 9, 12, 15, 1, 18, 4, 7, 10, 13, 16, 2, 19, 5, 8, 11, 14, 0, 17, 3, 20, 6, 9, 12, 15, 1]

cp's OEIS Frontend

A025637 Exponent of 2 (value of i) in n-th number of form 2^i*7^j.

Table of values

List of values

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

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

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