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.

A090816 a(n) = (3*n+1)!/((2*n)! * n!).

Table of values

n a(n)
0 1
1 12
2 105
3 840
4 6435
5 48048
6 352716
7 2558160
8 18386775
9 131231100
10 931395465
11 6580248480
12 46312074900
13 324897017760
14 2272989850440
15 15863901576864
16 110487596768703
17 768095592509700
18 5330949171823275
19 36945070220658600
20 255702514854135195
21 1767643865751234240

List of values

[1, 12, 105, 840, 6435, 48048, 352716, 2558160, 18386775, 131231100, 931395465, 6580248480, 46312074900, 324897017760, 2272989850440, 15863901576864, 110487596768703, 768095592509700, 5330949171823275, 36945070220658600, 255702514854135195, 1767643865751234240]