A270043 - cp's OEIS frontend

A270043 a(n) = Smallest m >= 15 containing no sevens when represented in any base from 8 through n.

n	a(n)
8	16
9	17
10	18
11	19
12	20
13	21
14	22
15	24
16	24
17	26
18	26
19	28
20	28
21	30
22	30
23	32
24	32
25	36
26	36
27	36
28	36
29	38
30	38
31	42
32	42
33	42
34	42
35	44
36	44
37	48
38	48
39	48
40	48
41	50
42	50
43	54
44	54
45	54
46	54
47	386
48	386
49	396
50	400
51	426
52	426
53	426
54	515
55	515
56	515
57	515
58	515
59	515
60	515
61	515
62	515
63	515
64	515
65	528

[16, 17, 18, 19, 20, 21, 22, 24, 24, 26, 26, 28, 28, 30, 30, 32, 32, 36, 36, 36, 36, 38, 38, 42, 42, 42, 42, 44, 44, 48, 48, 48, 48, 50, 50, 54, 54, 54, 54, 386, 386, 396, 400, 426, 426, 426, 515, 515, 515, 515, 515, 515, 515, 515, 515, 515, 515, 528]

cp's OEIS Frontend

A270043 a(n) = Smallest m >= 15 containing no sevens when represented in any base from 8 through n.

Table of values

List of values

n	a(n)
8	16
9	17
10	18
11	19
12	20
13	21
14	22
15	24
16	24
17	26
18	26
19	28
20	28
21	30
22	30
23	32
24	32
25	36
26	36
27	36
28	36
29	38
30	38
31	42
32	42
33	42
34	42
35	44
36	44
37	48
38	48
39	48
40	48
41	50
42	50
43	54
44	54
45	54
46	54
47	386
48	386
49	396
50	400
51	426
52	426
53	426
54	515
55	515
56	515
57	515
58	515
59	515
60	515
61	515
62	515
63	515
64	515
65	528

n	a(n)
8	16
9	17
10	18
11	19
12	20
13	21
14	22
15	24
16	24
17	26
18	26
19	28
20	28
21	30
22	30
23	32
24	32
25	36
26	36
27	36
28	36
29	38
30	38
31	42
32	42
33	42
34	42
35	44
36	44
37	48
38	48
39	48
40	48
41	50
42	50
43	54
44	54
45	54
46	54
47	386
48	386
49	396
50	400
51	426
52	426
53	426
54	515
55	515
56	515
57	515
58	515
59	515
60	515
61	515
62	515
63	515
64	515
65	528

n	a(n)
8	16
9	17
10	18
11	19
12	20
13	21
14	22
15	24
16	24
17	26
18	26
19	28
20	28
21	30
22	30
23	32
24	32
25	36
26	36
27	36
28	36
29	38
30	38
31	42
32	42
33	42
34	42
35	44
36	44
37	48
38	48
39	48
40	48
41	50
42	50
43	54
44	54
45	54
46	54
47	386
48	386
49	396
50	400
51	426
52	426
53	426
54	515
55	515
56	515
57	515
58	515
59	515
60	515
61	515
62	515
63	515
64	515
65	528