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.

A052657 Expansion of e.g.f. x^2/((1-x)^2*(1+x)).

Table of values

n a(n)
0 0
1 0
2 2
3 6
4 48
5 240
6 2160
7 15120
8 161280
9 1451520
10 18144000
11 199584000
12 2874009600
13 37362124800
14 610248038400
15 9153720576000
16 167382319104000
17 2845499424768000
18 57621363351552000
19 1094805903679488000
20 24329020081766400000
21 510909421717094400000
22 12364008005553684480000

List of values

[0, 0, 2, 6, 48, 240, 2160, 15120, 161280, 1451520, 18144000, 199584000, 2874009600, 37362124800, 610248038400, 9153720576000, 167382319104000, 2845499424768000, 57621363351552000, 1094805903679488000, 24329020081766400000, 510909421717094400000, 12364008005553684480000]

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

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