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.

A205825 a(n) = n!/ceiling(n/2)!.

Table of values

n a(n)
0 1
1 1
2 2
3 3
4 12
5 20
6 120
7 210
8 1680
9 3024
10 30240
11 55440
12 665280
13 1235520
14 17297280
15 32432400
16 518918400
17 980179200
18 17643225600
19 33522128640
20 670442572800
21 1279935820800
22 28158588057600
23 53970627110400
24 1295295050649600
25 2490952020480000
26 64764752532480000

List of values

[1, 1, 2, 3, 12, 20, 120, 210, 1680, 3024, 30240, 55440, 665280, 1235520, 17297280, 32432400, 518918400, 980179200, 17643225600, 33522128640, 670442572800, 1279935820800, 28158588057600, 53970627110400, 1295295050649600, 2490952020480000, 64764752532480000]

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

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