A063567 - cp's OEIS frontend

A063567 Smallest positive power of 4 having n in its decimal representation.

n	a(n)
0	5
1	2
2	4
3	7
4	1
5	4
6	2
7	10
8	7
9	6
10	5
11	20
12	25
13	35
14	9
15	29
16	2
17	17
18	15
19	11
20	28
21	9
22	36
23	29
24	5
25	4
26	9
27	19
28	24
29	16
30	11
31	37
32	38
33	43
34	35
35	14
36	8
37	15
38	7
39	21
40	6
41	11
42	16
43	11
44	9
45	14
46	21
47	18
48	10
49	16
50	26
51	20
52	30
53	8
54	14
55	8
56	4
57	10
58	25
59	22
60	22
61	29
62	9
63	7
64	3
65	8
66	23
67	12
68	14
69	17
70	23
71	13

[5, 2, 4, 7, 1, 4, 2, 10, 7, 6, 5, 20, 25, 35, 9, 29, 2, 17, 15, 11, 28, 9, 36, 29, 5, 4, 9, 19, 24, 16, 11, 37, 38, 43, 35, 14, 8, 15, 7, 21, 6, 11, 16, 11, 9, 14, 21, 18, 10, 16, 26, 20, 30, 8, 14, 8, 4, 10, 25, 22, 22, 29, 9, 7, 3, 8, 23, 12, 14, 17, 23, 13]

cp's OEIS Frontend

A063567 Smallest positive power of 4 having n in its decimal representation.

Table of values

List of values

n	a(n)
0	5
1	2
2	4
3	7
4	1
5	4
6	2
7	10
8	7
9	6
10	5
11	20
12	25
13	35
14	9
15	29
16	2
17	17
18	15
19	11
20	28
21	9
22	36
23	29
24	5
25	4
26	9
27	19
28	24
29	16
30	11
31	37
32	38
33	43
34	35
35	14
36	8
37	15
38	7
39	21
40	6
41	11
42	16
43	11
44	9
45	14
46	21
47	18
48	10
49	16
50	26
51	20
52	30
53	8
54	14
55	8
56	4
57	10
58	25
59	22
60	22
61	29
62	9
63	7
64	3
65	8
66	23
67	12
68	14
69	17
70	23
71	13

n	a(n)
0	5
1	2
2	4
3	7
4	1
5	4
6	2
7	10
8	7
9	6
10	5
11	20
12	25
13	35
14	9
15	29
16	2
17	17
18	15
19	11
20	28
21	9
22	36
23	29
24	5
25	4
26	9
27	19
28	24
29	16
30	11
31	37
32	38
33	43
34	35
35	14
36	8
37	15
38	7
39	21
40	6
41	11
42	16
43	11
44	9
45	14
46	21
47	18
48	10
49	16
50	26
51	20
52	30
53	8
54	14
55	8
56	4
57	10
58	25
59	22
60	22
61	29
62	9
63	7
64	3
65	8
66	23
67	12
68	14
69	17
70	23
71	13

n	a(n)
0	5
1	2
2	4
3	7
4	1
5	4
6	2
7	10
8	7
9	6
10	5
11	20
12	25
13	35
14	9
15	29
16	2
17	17
18	15
19	11
20	28
21	9
22	36
23	29
24	5
25	4
26	9
27	19
28	24
29	16
30	11
31	37
32	38
33	43
34	35
35	14
36	8
37	15
38	7
39	21
40	6
41	11
42	16
43	11
44	9
45	14
46	21
47	18
48	10
49	16
50	26
51	20
52	30
53	8
54	14
55	8
56	4
57	10
58	25
59	22
60	22
61	29
62	9
63	7
64	3
65	8
66	23
67	12
68	14
69	17
70	23
71	13