A258802 - cp's OEIS frontend

A258802 Least base b >= 2 such that prime(n) is an absolute prime in base b with at least 2 distinct digits or 0 if no such base exists.

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

[0, 0, 3, 3, 5, 4, 5, 5, 4, 4, 6, 7, 7, 7, 7, 4, 8, 8, 9, 6, 9, 9, 11, 7, 7, 9, 11, 11, 13, 10, 13, 10, 12, 11, 13, 17, 14, 11, 12, 9, 16, 9, 6, 13, 15, 10, 6, 11, 19, 12, 19, 13, 11, 16, 7, 17, 19, 19, 12, 7, 16, 19, 7, 10, 13, 19, 22, 7, 19, 19, 18, 18, 21, 10]

cp's OEIS Frontend

A258802 Least base b >= 2 such that prime(n) is an absolute prime in base b with at least 2 distinct digits or 0 if no such base exists.

Table of values

List of values

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

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

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