A270034 - cp's OEIS frontend

A270034 a(n) is the smallest b for which the base-b representation of n contains at least one 8 (or 0 if no such base exists).

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

[0, 0, 0, 0, 0, 0, 0, 9, 0, 0, 0, 0, 0, 0, 0, 0, 9, 10, 11, 12, 13, 14, 15, 16, 17, 9, 19, 10, 21, 11, 23, 12, 25, 13, 9, 14, 29, 10, 31, 16, 11, 17, 35, 9, 37, 19, 13, 10, 41, 14, 43, 11, 9, 23, 47, 12, 49, 10, 17, 13, 53, 9, 11, 14, 19, 29, 59, 10, 61, 31, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9]

cp's OEIS Frontend

A270034 a(n) is the smallest b for which the base-b representation of n contains at least one 8 (or 0 if no such base exists).

Table of values

List of values

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

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

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