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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.

A332194 a(n) = 10^(2n+1) - 1 - 5*10^n.

Table of values

n a(n)
0 4
1 949
2 99499
3 9994999
4 999949999
5 99999499999
6 9999994999999
7 999999949999999
8 99999999499999999
9 9999999994999999999
10 999999999949999999999
11 99999999999499999999999
12 9999999999994999999999999
13 999999999999949999999999999
14 99999999999999499999999999999
15 9999999999999994999999999999999

List of values

[4, 949, 99499, 9994999, 999949999, 99999499999, 9999994999999, 999999949999999, 99999999499999999, 9999999994999999999, 999999999949999999999, 99999999999499999999999, 9999999999994999999999999, 999999999999949999999999999, 99999999999999499999999999999, 9999999999999994999999999999999]

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

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