A291592 - cp's OEIS frontend

A291592 Number of bases for which 2^n-1 is a repdigit with at least 3 digits.

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

[0, 0, 1, 1, 2, 2, 1, 2, 2, 2, 1, 4, 2, 2, 3, 3, 1, 4, 1, 4, 3, 2, 1, 6, 2, 2, 3, 4, 1, 6, 1, 4, 3, 2, 3, 7, 1, 2, 3, 6, 1, 6, 1, 4, 5, 2, 1, 8, 2, 4, 3, 4, 1, 6, 3, 6, 3, 2, 1, 10, 1, 2, 5, 5, 3, 6, 1, 4, 3, 6, 1, 10]

cp's OEIS Frontend

A291592 Number of bases for which 2^n-1 is a repdigit with at least 3 digits.

Table of values

List of values

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

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

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