A236356 - cp's OEIS frontend

A236356 a(n) is the concatenation of the numbers k, 2 <= k <= 9, such that the base-k representation of n, read as a decimal number, is prime; a(n) = 0 if there is no such base.

n	a(n)
1	0
2	3456789
3	2456789
4	3
5	246789
6	5
7	4689
8	57
9	68
10	379
11	48
12	9
13	45
14	0
15	68
16	59
17	47
18	0
19	468
20	0
21	59
22	37
23	245
24	0
25	68
26	5
27	6
28	59
29	47
30	0
31	78
32	0
33	568
34	39
35	8
36	0
37	469
38	7
39	689
40	0
41	5
42	0
43	4789
44	0
45	6
46	3
47	24
48	9
49	8
50	7
51	0
52	7
53	4
54	0
55	4689
56	5
57	8
58	3
59	78
60	0
61	49
62	0
63	5
64	9
65	8
66	9
67	368
68	5

[0, 3456789, 2456789, 3, 246789, 5, 4689, 57, 68, 379, 48, 9, 45, 0, 68, 59, 47, 0, 468, 0, 59, 37, 245, 0, 68, 5, 6, 59, 47, 0, 78, 0, 568, 39, 8, 0, 469, 7, 689, 0, 5, 0, 4789, 0, 6, 3, 24, 9, 8, 7, 0, 7, 4, 0, 4689, 5, 8, 3, 78, 0, 49, 0, 5, 9, 8, 9, 368, 5]

cp's OEIS Frontend

A236356 a(n) is the concatenation of the numbers k, 2 <= k <= 9, such that the base-k representation of n, read as a decimal number, is prime; a(n) = 0 if there is no such base.

Table of values

List of values