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.

A072477 a(n) = (2*n)!*binomial(2*n,n)/8.

Table of values

n a(n)
2 18
3 1800
4 352800
5 114307200
6 55324684800
7 37399486924800
8 33659538232320000
9 38910426196561920000
10 56186655427835412480000
11 99113260174701667614720000
12 209723658529668728672747520000
13 524309146324171821681868800000000
14 1528885470681285032024329420800000000

List of values

[18, 1800, 352800, 114307200, 55324684800, 37399486924800, 33659538232320000, 38910426196561920000, 56186655427835412480000, 99113260174701667614720000, 209723658529668728672747520000, 524309146324171821681868800000000, 1528885470681285032024329420800000000]

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

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