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.

A081318 Integers n such that the reciprocal of the largest prime factor of 10^n-1 is not a repeating decimal fraction with a period of n.

Table of values

n a(n)
1 6
2 18
3 22
4 30
5 32
6 38
7 42
8 46
9 54
10 66
11 74
12 78
13 82
14 90
15 94
16 96
17 110
18 118
19 132
20 138
21 146
22 154
23 162
24 174
25 186
26 194
27 198
28 206
29 210
30 218
31 228
32 231
33 240
34 242
35 254
36 258
37 260
38 264
39 266
40 268
41 274
42 282
43 284
44 286
45 298
46 300
47 306
48 310
49 318
50 322
51 334
52 338
53 344
54 348

List of values

[6, 18, 22, 30, 32, 38, 42, 46, 54, 66, 74, 78, 82, 90, 94, 96, 110, 118, 132, 138, 146, 154, 162, 174, 186, 194, 198, 206, 210, 218, 228, 231, 240, 242, 254, 258, 260, 264, 266, 268, 274, 282, 284, 286, 298, 300, 306, 310, 318, 322, 334, 338, 344, 348]

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

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