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.

A000407 a(n) = (2*n+1)! / n!.

Table of values

n a(n)
0 1
1 6
2 60
3 840
4 15120
5 332640
6 8648640
7 259459200
8 8821612800
9 335221286400
10 14079294028800
11 647647525324800
12 32382376266240000
13 1748648318376960000
14 101421602465863680000
15 6288139352883548160000
16 415017197290314178560000

List of values

[1, 6, 60, 840, 15120, 332640, 8648640, 259459200, 8821612800, 335221286400, 14079294028800, 647647525324800, 32382376266240000, 1748648318376960000, 101421602465863680000, 6288139352883548160000, 415017197290314178560000]

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

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