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.

A361033 a(n) = 3*(4*n)!/(n!*(n+1)!^3).

Table of values

n a(n)
0 3
1 9
2 280
3 17325
4 1513512
5 162954792
6 20193091776
7 2768662192725
8 409716429837000
9 64358256798795960
10 10605621798062141760
11 1817833036248401270280
12 321997225483126007438400
13 58649494641569379926280000
14 10941649720331183519046796800
15 2084191938036600263793119045925

List of values

[3, 9, 280, 17325, 1513512, 162954792, 20193091776, 2768662192725, 409716429837000, 64358256798795960, 10605621798062141760, 1817833036248401270280, 321997225483126007438400, 58649494641569379926280000, 10941649720331183519046796800, 2084191938036600263793119045925]