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.

A052566 Expansion of e.g.f. (2 + x)/(1 - x^2).

Table of values

n a(n)
0 2
1 1
2 4
3 6
4 48
5 120
6 1440
7 5040
8 80640
9 362880
10 7257600
11 39916800
12 958003200
13 6227020800
14 174356582400
15 1307674368000
16 41845579776000
17 355687428096000
18 12804747411456000
19 121645100408832000
20 4865804016353280000
21 51090942171709440000
22 2248001455555215360000

List of values

[2, 1, 4, 6, 48, 120, 1440, 5040, 80640, 362880, 7257600, 39916800, 958003200, 6227020800, 174356582400, 1307674368000, 41845579776000, 355687428096000, 12804747411456000, 121645100408832000, 4865804016353280000, 51090942171709440000, 2248001455555215360000]

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

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