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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.

A169858 Smallest integer k such that k or one of its left substrings (or prefixes, regarded as an integer) is divisible by any integer from {1,2,...,n}.

Table of values

n a(n)
1 1
2 2
3 6
4 12
5 45
6 60
7 245
8 245
9 504
10 504
11 5049
12 5049
13 10296
14 11760
15 11760
16 11760
17 56160
18 56160
19 198016
20 198016
21 1008159
22 1323008
23 2340849
24 6240366
25 13442580
26 13442580
27 37536408
28 37536408
29 75432065
30 75432065
31 180092645
32 319800096
33 319800096
34 800640126
35 2201169600
36 2201169600
37 3780487275
38 5250966084
39 5250966084
40 6832425609
41 36960308625
42 36960308625
43 62244072512
44 62244072512
45 62244072512
46 62244072512
47 372960042489
48 372960042489

List of values

[1, 2, 6, 12, 45, 60, 245, 245, 504, 504, 5049, 5049, 10296, 11760, 11760, 11760, 56160, 56160, 198016, 198016, 1008159, 1323008, 2340849, 6240366, 13442580, 13442580, 37536408, 37536408, 75432065, 75432065, 180092645, 319800096, 319800096, 800640126, 2201169600, 2201169600, 3780487275, 5250966084, 5250966084, 6832425609, 36960308625, 36960308625, 62244072512, 62244072512, 62244072512, 62244072512, 372960042489, 372960042489]

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

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