A050723 - cp's OEIS frontend

A050723 Numbers k such that the decimal expansion of 2^k contains no pair of consecutive equal digits (probably finite).

n	a(n)
1	0
2	1
3	2
4	3
5	4
6	5
7	6
8	7
9	8
10	9
11	10
12	11
13	12
14	13
15	14
16	15
17	17
18	20
19	21
20	22
21	28
22	29
23	30
24	31
25	32
26	34
27	35
28	36
29	37
30	48
31	54
32	55
33	56
34	66
35	67
36	68
37	69
38	80
39	87
40	104
41	126

[0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 17, 20, 21, 22, 28, 29, 30, 31, 32, 34, 35, 36, 37, 48, 54, 55, 56, 66, 67, 68, 69, 80, 87, 104, 126]

cp's OEIS Frontend

A050723 Numbers k such that the decimal expansion of 2^k contains no pair of consecutive equal digits (probably finite).

Table of values

List of values

n	a(n)
1	0
2	1
3	2
4	3
5	4
6	5
7	6
8	7
9	8
10	9
11	10
12	11
13	12
14	13
15	14
16	15
17	17
18	20
19	21
20	22
21	28
22	29
23	30
24	31
25	32
26	34
27	35
28	36
29	37
30	48
31	54
32	55
33	56
34	66
35	67
36	68
37	69
38	80
39	87
40	104
41	126

n	a(n)
1	0
2	1
3	2
4	3
5	4
6	5
7	6
8	7
9	8
10	9
11	10
12	11
13	12
14	13
15	14
16	15
17	17
18	20
19	21
20	22
21	28
22	29
23	30
24	31
25	32
26	34
27	35
28	36
29	37
30	48
31	54
32	55
33	56
34	66
35	67
36	68
37	69
38	80
39	87
40	104
41	126

n	a(n)
1	0
2	1
3	2
4	3
5	4
6	5
7	6
8	7
9	8
10	9
11	10
12	11
13	12
14	13
15	14
16	15
17	17
18	20
19	21
20	22
21	28
22	29
23	30
24	31
25	32
26	34
27	35
28	36
29	37
30	48
31	54
32	55
33	56
34	66
35	67
36	68
37	69
38	80
39	87
40	104
41	126