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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.

A177096 a(n) = 5*(10^n - 2).

Table of values

n a(n)
1 40
2 490
3 4990
4 49990
5 499990
6 4999990
7 49999990
8 499999990
9 4999999990
10 49999999990
11 499999999990
12 4999999999990
13 49999999999990
14 499999999999990
15 4999999999999990
16 49999999999999990
17 499999999999999990
18 4999999999999999990
19 49999999999999999990
20 499999999999999999990

List of values

[40, 490, 4990, 49990, 499990, 4999990, 49999990, 499999990, 4999999990, 49999999990, 499999999990, 4999999999990, 49999999999990, 499999999999990, 4999999999999990, 49999999999999990, 499999999999999990, 4999999999999999990, 49999999999999999990, 499999999999999999990]

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

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