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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.

A078257 a(n) = denominator(N) where N = 0.123...n (concatenation of 1 to n after decimal point).

Table of values

n a(n)
1 10
2 25
3 1000
4 5000
5 20000
6 15625
7 10000000
8 50000000
9 1000000000
10 10000000000
11 10000000000000
12 125000000000000
13 100000000000000000
14 5000000000000000000
15 200000000000000000000
16 25000000000000000000000
17 10000000000000000000000000
18 500000000000000000000000000
19 100000000000000000000000000000

List of values

[10, 25, 1000, 5000, 20000, 15625, 10000000, 50000000, 1000000000, 10000000000, 10000000000000, 125000000000000, 100000000000000000, 5000000000000000000, 200000000000000000000, 25000000000000000000000, 10000000000000000000000000, 500000000000000000000000000, 100000000000000000000000000000]

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

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