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.

A101485 a(n) = (4n)! / ( 4^n * (2n)! ).

Table of values

n a(n)
0 1
1 3
2 105
3 10395
4 2027025
5 654729075
6 316234143225
7 213458046676875
8 191898783962510625
9 221643095476699771875
10 319830986772877770815625
11 563862029680583509947946875
12 1192568192774434123539907640625
13 2980227913743310874726229193921875

List of values

[1, 3, 105, 10395, 2027025, 654729075, 316234143225, 213458046676875, 191898783962510625, 221643095476699771875, 319830986772877770815625, 563862029680583509947946875, 1192568192774434123539907640625, 2980227913743310874726229193921875]