A025638 - cp's OEIS frontend

A025638 Exponent of 2 (value of i) in n-th number of form 2^i*9^j.

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

[0, 1, 2, 3, 0, 4, 1, 5, 2, 6, 3, 0, 7, 4, 1, 8, 5, 2, 9, 6, 3, 0, 10, 7, 4, 1, 11, 8, 5, 2, 12, 9, 6, 3, 0, 13, 10, 7, 4, 1, 14, 11, 8, 5, 2, 15, 12, 9, 6, 3, 0, 16, 13, 10, 7, 4, 1, 17, 14, 11, 8, 5, 2, 18, 15, 12, 9, 6, 3, 19, 0, 16, 13, 10, 7, 4, 20, 1, 17, 14, 11, 8, 5, 21, 2, 18, 15, 12, 9, 6, 22]

cp's OEIS Frontend

A025638 Exponent of 2 (value of i) in n-th number of form 2^i*9^j.

Table of values

List of values

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

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

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