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.

A359761 a(n) = binomial(4*n, 2*n)*(2*n)!/(2^n*n!).

Table of values

n a(n)
0 1
1 6
2 210
3 13860
4 1351350
5 174594420
6 28109701620
7 5421156741000
8 1218404977539750
9 312723944235202500
10 90252130306279441500
11 28929910132721937339000
12 10197793321784482911997500
13 3920659309406065045704885000
14 1632674555274097086889962825000
15 732091270584905133761459330730000

List of values

[1, 6, 210, 13860, 1351350, 174594420, 28109701620, 5421156741000, 1218404977539750, 312723944235202500, 90252130306279441500, 28929910132721937339000, 10197793321784482911997500, 3920659309406065045704885000, 1632674555274097086889962825000, 732091270584905133761459330730000]