A025649 - cp's OEIS frontend

A025649 Exponent of 4 (value of i) in n-th number of form 4^i*10^j.

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

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

cp's OEIS Frontend

A025649 Exponent of 4 (value of i) in n-th number of form 4^i*10^j.

Table of values

List of values

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

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

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