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.

A055842 Expansion of (1-x)^2/(1-5*x).

Table of values

n a(n)
0 1
1 3
2 16
3 80
4 400
5 2000
6 10000
7 50000
8 250000
9 1250000
10 6250000
11 31250000
12 156250000
13 781250000
14 3906250000
15 19531250000
16 97656250000
17 488281250000
18 2441406250000
19 12207031250000
20 61035156250000
21 305175781250000
22 1525878906250000
23 7629394531250000

List of values

[1, 3, 16, 80, 400, 2000, 10000, 50000, 250000, 1250000, 6250000, 31250000, 156250000, 781250000, 3906250000, 19531250000, 97656250000, 488281250000, 2441406250000, 12207031250000, 61035156250000, 305175781250000, 1525878906250000, 7629394531250000]

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

Content is available under The OEIS End-User License Agreement.