A071531 - cp's OEIS frontend

A071531 Smallest exponent r such that n^r contains at least one zero digit (in base 10).

n	a(n)
2	10
3	10
4	5
5	8
6	9
7	4
8	4
9	5
10	1
11	5
12	4
13	6
14	7
15	4
16	3
17	7
18	4
19	4
20	1
21	5
22	3
23	6
24	6
25	4
26	6
27	5
28	5
29	4
30	1
31	6
32	2
33	2
34	3
35	4
36	5
37	3
38	4
39	5
40	1
41	5
42	3
43	3
44	4
45	2
46	5
47	2
48	2
49	2
50	1
51	2
52	2
53	2
54	4
55	2
56	5
57	4
58	6
59	3
60	1
61	5
62	6
63	3
64	2
65	4
66	6
67	3
68	9
69	3
70	1
71	2
72	6
73	3
74	3
75	4
76	8
77	4
78	2
79	3
80	1
81	4
82	5
83	5
84	2
85	4
86	3
87	3
88	6
89	3
90	1
91	5
92	5
93	3
94	3
95	2
96	7
97	2
98	2
99	2
100	1
101	1
102	1
103	1
104	1
105	1

[10, 10, 5, 8, 9, 4, 4, 5, 1, 5, 4, 6, 7, 4, 3, 7, 4, 4, 1, 5, 3, 6, 6, 4, 6, 5, 5, 4, 1, 6, 2, 2, 3, 4, 5, 3, 4, 5, 1, 5, 3, 3, 4, 2, 5, 2, 2, 2, 1, 2, 2, 2, 4, 2, 5, 4, 6, 3, 1, 5, 6, 3, 2, 4, 6, 3, 9, 3, 1, 2, 6, 3, 3, 4, 8, 4, 2, 3, 1, 4, 5, 5, 2, 4, 3, 3, 6, 3, 1, 5, 5, 3, 3, 2, 7, 2, 2, 2, 1, 1, 1, 1, 1, 1]

cp's OEIS Frontend

A071531 Smallest exponent r such that n^r contains at least one zero digit (in base 10).

Table of values

List of values

n	a(n)
2	10
3	10
4	5
5	8
6	9
7	4
8	4
9	5
10	1
11	5
12	4
13	6
14	7
15	4
16	3
17	7
18	4
19	4
20	1
21	5
22	3
23	6
24	6
25	4
26	6
27	5
28	5
29	4
30	1
31	6
32	2
33	2
34	3
35	4
36	5
37	3
38	4
39	5
40	1
41	5
42	3
43	3
44	4
45	2
46	5
47	2
48	2
49	2
50	1
51	2
52	2
53	2
54	4
55	2
56	5
57	4
58	6
59	3
60	1
61	5
62	6
63	3
64	2
65	4
66	6
67	3
68	9
69	3
70	1
71	2
72	6
73	3
74	3
75	4
76	8
77	4
78	2
79	3
80	1
81	4
82	5
83	5
84	2
85	4
86	3
87	3
88	6
89	3
90	1
91	5
92	5
93	3
94	3
95	2
96	7
97	2
98	2
99	2
100	1
101	1
102	1
103	1
104	1
105	1

n	a(n)
2	10
3	10
4	5
5	8
6	9
7	4
8	4
9	5
10	1
11	5
12	4
13	6
14	7
15	4
16	3
17	7
18	4
19	4
20	1
21	5
22	3
23	6
24	6
25	4
26	6
27	5
28	5
29	4
30	1
31	6
32	2
33	2
34	3
35	4
36	5
37	3
38	4
39	5
40	1
41	5
42	3
43	3
44	4
45	2
46	5
47	2
48	2
49	2
50	1
51	2
52	2
53	2
54	4
55	2
56	5
57	4
58	6
59	3
60	1
61	5
62	6
63	3
64	2
65	4
66	6
67	3
68	9
69	3
70	1
71	2
72	6
73	3
74	3
75	4
76	8
77	4
78	2
79	3
80	1
81	4
82	5
83	5
84	2
85	4
86	3
87	3
88	6
89	3
90	1
91	5
92	5
93	3
94	3
95	2
96	7
97	2
98	2
99	2
100	1
101	1
102	1
103	1
104	1
105	1

n	a(n)
2	10
3	10
4	5
5	8
6	9
7	4
8	4
9	5
10	1
11	5
12	4
13	6
14	7
15	4
16	3
17	7
18	4
19	4
20	1
21	5
22	3
23	6
24	6
25	4
26	6
27	5
28	5
29	4
30	1
31	6
32	2
33	2
34	3
35	4
36	5
37	3
38	4
39	5
40	1
41	5
42	3
43	3
44	4
45	2
46	5
47	2
48	2
49	2
50	1
51	2
52	2
53	2
54	4
55	2
56	5
57	4
58	6
59	3
60	1
61	5
62	6
63	3
64	2
65	4
66	6
67	3
68	9
69	3
70	1
71	2
72	6
73	3
74	3
75	4
76	8
77	4
78	2
79	3
80	1
81	4
82	5
83	5
84	2
85	4
86	3
87	3
88	6
89	3
90	1
91	5
92	5
93	3
94	3
95	2
96	7
97	2
98	2
99	2
100	1
101	1
102	1
103	1
104	1
105	1