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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.

A003948 Expansion of (1+x)/(1-5*x).

Table of values

n a(n)
0 1
1 6
2 30
3 150
4 750
5 3750
6 18750
7 93750
8 468750
9 2343750
10 11718750
11 58593750
12 292968750
13 1464843750
14 7324218750
15 36621093750
16 183105468750
17 915527343750
18 4577636718750
19 22888183593750
20 114440917968750
21 572204589843750
22 2861022949218750
23 14305114746093750

List of values

[1, 6, 30, 150, 750, 3750, 18750, 93750, 468750, 2343750, 11718750, 58593750, 292968750, 1464843750, 7324218750, 36621093750, 183105468750, 915527343750, 4577636718750, 22888183593750, 114440917968750, 572204589843750, 2861022949218750, 14305114746093750]

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

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