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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.

A181965 a(n) = 10^(2n+1) - 10^n - 1.

Table of values

n a(n)
0 8
1 989
2 99899
3 9998999
4 999989999
5 99999899999
6 9999998999999
7 999999989999999
8 99999999899999999
9 9999999998999999999
10 999999999989999999999
11 99999999999899999999999
12 9999999999998999999999999
13 999999999999989999999999999
14 99999999999999899999999999999
15 9999999999999998999999999999999

List of values

[8, 989, 99899, 9998999, 999989999, 99999899999, 9999998999999, 999999989999999, 99999999899999999, 9999999998999999999, 999999999989999999999, 99999999999899999999999, 9999999999998999999999999, 999999999999989999999999999, 99999999999999899999999999999, 9999999999999998999999999999999]

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

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