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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.

A181811 a(n) = smallest integer that, upon multiplying any divisor of n, produces a member of A025487.

Table of values

n a(n)
1 1
2 1
3 2
4 1
5 6
6 2
7 30
8 1
9 4
10 6
11 210
12 2
13 2310
14 30
15 12
16 1
17 30030
18 4
19 510510
20 6
21 60
22 210
23 9699690
24 2
25 36
26 2310
27 8
28 30
29 223092870
30 12
31 6469693230
32 1
33 420
34 30030
35 180
36 4
37 200560490130
38 510510
39 4620
40 6
41 7420738134810
42 60
43 304250263527210
44 210
45 24
46 9699690

List of values

[1, 1, 2, 1, 6, 2, 30, 1, 4, 6, 210, 2, 2310, 30, 12, 1, 30030, 4, 510510, 6, 60, 210, 9699690, 2, 36, 2310, 8, 30, 223092870, 12, 6469693230, 1, 420, 30030, 180, 4, 200560490130, 510510, 4620, 6, 7420738134810, 60, 304250263527210, 210, 24, 9699690]

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

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