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.

A110491 Expansion of e.g.f.: sqrt(1+2x)/sqrt(1-2x).

Table of values

n a(n)
0 1
1 2
2 4
3 24
4 144
5 1440
6 14400
7 201600
8 2822400
9 50803200
10 914457600
11 20118067200
12 442597478400
13 11507534438400
14 299195895398400
15 8975876861952000
16 269276305858560000
17 9155394399191040000
18 311283409572495360000

List of values

[1, 2, 4, 24, 144, 1440, 14400, 201600, 2822400, 50803200, 914457600, 20118067200, 442597478400, 11507534438400, 299195895398400, 8975876861952000, 269276305858560000, 9155394399191040000, 311283409572495360000]

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

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