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.

A002867 a(n) = binomial(n,floor(n/2))*(n+1)!.

Table of values

n a(n)
0 1
1 2
2 12
3 72
4 720
5 7200
6 100800
7 1411200
8 25401600
9 457228800
10 10059033600
11 221298739200
12 5753767219200
13 149597947699200
14 4487938430976000
15 134638152929280000
16 4577697199595520000
17 155641704786247680000
18 5914384781877411840000
19 224746621711341649920000

List of values

[1, 2, 12, 72, 720, 7200, 100800, 1411200, 25401600, 457228800, 10059033600, 221298739200, 5753767219200, 149597947699200, 4487938430976000, 134638152929280000, 4577697199595520000, 155641704786247680000, 5914384781877411840000, 224746621711341649920000]

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

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