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.

A256350 Composites in base 10 that remain composite in exactly eight bases b, 2 <= b <= 10, expansions interpreted as decimal numbers.

Table of values

n a(n)
1 4
2 6
3 12
4 26
5 27
6 35
7 38
8 45
9 46
10 48
11 49
12 50
13 52
14 56
15 57
16 58
17 63
18 64
19 65
20 66
21 68
22 77
23 81
24 82
25 84
26 85
27 88
28 95
29 105
30 116
31 117
32 118
33 119
34 121
35 122
36 134
37 136
38 138
39 142
40 153
41 154
42 161
43 165
44 166
45 171
46 175
47 176
48 187
49 188
50 190
51 192
52 195
53 207
54 208
55 218
56 219
57 220
58 225

List of values

[4, 6, 12, 26, 27, 35, 38, 45, 46, 48, 49, 50, 52, 56, 57, 58, 63, 64, 65, 66, 68, 77, 81, 82, 84, 85, 88, 95, 105, 116, 117, 118, 119, 121, 122, 134, 136, 138, 142, 153, 154, 161, 165, 166, 171, 175, 176, 187, 188, 190, 192, 195, 207, 208, 218, 219, 220, 225]

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

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