A020665 - cp's OEIS frontend

A020665 a(n) is the (conjectured) maximal exponent k such that n^k does not contain a digit zero in its decimal expansion.

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

[86, 68, 43, 58, 44, 35, 27, 34, 0, 41, 26, 14, 34, 27, 19, 27, 17, 44, 0, 13, 22, 10, 13, 29, 15, 9, 16, 14, 0, 16, 7, 23, 5, 17, 22, 16, 10, 19, 0, 9, 13, 10, 6, 39, 7, 8, 19, 5, 0, 19, 18, 7, 13, 11, 23, 7, 23, 14, 0, 16, 5, 14, 12, 3, 14, 14, 14, 12, 0, 8, 22, 6, 4, 19, 11, 12, 10, 9, 0]

cp's OEIS Frontend

A020665 a(n) is the (conjectured) maximal exponent k such that n^k does not contain a digit zero in its decimal expansion.

Table of values

List of values

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

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

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