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.

A256354 Composites in base 10 that remain composite in exactly four bases b, 2 <= b <= 10, expansions interpreted as decimal numbers.

Table of values

n a(n)
1 115
2 2563
3 3523
4 5071
5 9193
6 10873
7 12223
8 12811
9 13231
10 15775
11 19111
12 20203
13 23089
14 25831
15 27007
16 28171
17 34189
18 39859
19 40033
20 43361
21 55033
22 57871
23 58813
24 74371
25 84253
26 89377
27 93043
28 95833
29 101683
30 117001
31 125359
32 126673
33 128953
34 131029
35 134527
36 137467
37 138193

List of values

[115, 2563, 3523, 5071, 9193, 10873, 12223, 12811, 13231, 15775, 19111, 20203, 23089, 25831, 27007, 28171, 34189, 39859, 40033, 43361, 55033, 57871, 58813, 74371, 84253, 89377, 93043, 95833, 101683, 117001, 125359, 126673, 128953, 131029, 134527, 137467, 138193]

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

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