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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.

A371641 The smallest composite number which divides the concatenation of its ascending ordered prime factors, with repetition, when written in base n.

Table of values

n a(n)
2 85329
3 4
4 224675
5 4
6 1140391
7 4
8 9
9 4
10 28749
11 4
12 841
13 4
14 9
15 4
16 239571
17 4
18 343
19 4
20 9
21 4
22 231
23 4
24 25
25 4
26 9
27 4
28 315
29 4
30 343
31 4
32 9
33 4
34 25
35 4
36 9761637601
37 4
38 9
39 4
40 4234329
41 4
42 715
43 4
44 9
45 4
46 609
47 4
48 49
49 4
50 9
51 4
52 195
53 4
54 25
55 4
56 9
57 4
58 1015
59 4
60 76729
61 4
62 9
63 4
64 25
65 4
66 14332171

List of values

[85329, 4, 224675, 4, 1140391, 4, 9, 4, 28749, 4, 841, 4, 9, 4, 239571, 4, 343, 4, 9, 4, 231, 4, 25, 4, 9, 4, 315, 4, 343, 4, 9, 4, 25, 4, 9761637601, 4, 9, 4, 4234329, 4, 715, 4, 9, 4, 609, 4, 49, 4, 9, 4, 195, 4, 25, 4, 9, 4, 1015, 4, 76729, 4, 9, 4, 25, 4, 14332171]

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

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