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.

A002454 Central factorial numbers: a(n) = 4^n * (n!)^2.

Table of values

n a(n)
0 1
1 4
2 64
3 2304
4 147456
5 14745600
6 2123366400
7 416179814400
8 106542032486400
9 34519618525593600
10 13807847410237440000
11 6682998146554920960000
12 3849406932415634472960000
13 2602199086312968903720960000
14 2040124083669367620517232640000
15 1836111675302430858465509376000000

List of values

[1, 4, 64, 2304, 147456, 14745600, 2123366400, 416179814400, 106542032486400, 34519618525593600, 13807847410237440000, 6682998146554920960000, 3849406932415634472960000, 2602199086312968903720960000, 2040124083669367620517232640000, 1836111675302430858465509376000000]

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

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