cp's OEIS Frontend

This is a front-end for the Online Encyclopedia of Integer Sequences, made by Christian Perfect. The idea is to provide OEIS entries in non-ancient HTML, and then to think about how they're presented visually. The source code is on GitHub.

A089319 Smallest k > 1 such that k^n followed by digit 1 is a prime.

Table of values

n a(n)
1 3
2 2
3 3
4 3
5 6
6 2
7 3
8 6
9 3
10 11
11 7
12 2
13 70
14 2
15 22
16 18
17 43
18 3
19 4
20 649
21 15
22 3
23 37
24 2
25 24
26 13
27 4
28 8
29 40
30 77
31 19
32 22
33 13
34 24
35 292
36 48
37 4
38 2
39 109
40 792
41 30
42 4
43 18
44 5
45 7
46 90
47 28
48 138
49 132
50 891
51 9
52 25
53 145
54 2
55 24
56 9
57 40
58 28
59 219
60 165
61 40
62 41
63 4
64 13
65 261
66 24
67 6
68 30
69 6
70 154
71 82
72 22
73 120
74 2
75 55

List of values

[3, 2, 3, 3, 6, 2, 3, 6, 3, 11, 7, 2, 70, 2, 22, 18, 43, 3, 4, 649, 15, 3, 37, 2, 24, 13, 4, 8, 40, 77, 19, 22, 13, 24, 292, 48, 4, 2, 109, 792, 30, 4, 18, 5, 7, 90, 28, 138, 132, 891, 9, 25, 145, 2, 24, 9, 40, 28, 219, 165, 40, 41, 4, 13, 261, 24, 6, 30, 6, 154, 82, 22, 120, 2, 55]

Started in 1964 by Neil J. A. Sloane | Maintained by The OEIS Foundation Inc.

Content is available under The OEIS End-User License Agreement.