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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.

A173558 a(n) is the smallest number whose factorial has 10^n trailing zeros.

Table of values

n a(n)
0 5
1 45
2 405
3 4005
4 40010
5 400005
6 4000005
7 40000010
8 400000015
9 4000000015
10 40000000015
11 400000000015
12 4000000000010
13 40000000000015
14 400000000000020
15 4000000000000025
16 40000000000000025
17 400000000000000025

List of values

[5, 45, 405, 4005, 40010, 400005, 4000005, 40000010, 400000015, 4000000015, 40000000015, 400000000015, 4000000000010, 40000000000015, 400000000000020, 4000000000000025, 40000000000000025, 400000000000000025]

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

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