cp's OEIS Frontend

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.

A270567 Expansion of g.f. (1+4*x)/(1-5*x).

Table of values

n a(n)
0 1
1 9
2 45
3 225
4 1125
5 5625
6 28125
7 140625
8 703125
9 3515625
10 17578125
11 87890625
12 439453125
13 2197265625
14 10986328125
15 54931640625
16 274658203125
17 1373291015625
18 6866455078125
19 34332275390625
20 171661376953125
21 858306884765625
22 4291534423828125
23 21457672119140625
24 107288360595703125

List of values

[1, 9, 45, 225, 1125, 5625, 28125, 140625, 703125, 3515625, 17578125, 87890625, 439453125, 2197265625, 10986328125, 54931640625, 274658203125, 1373291015625, 6866455078125, 34332275390625, 171661376953125, 858306884765625, 4291534423828125, 21457672119140625, 107288360595703125]

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

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