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.

A007724 Even minus odd extensions of truncated 3 X 2n grid diagram.

Table of values

n a(n)
2 2
3 12
4 110
5 1274
6 17136
7 255816
8 4124406
9 70549050
10 1264752060
11 23555382240
12 452806924752
13 8939481277552
14 180551099694400
15 3719061442253520
16 77933728043586630
17 1658001861319441050
18 35749633305661575300
19 780123576993991461000
20 17208112644166765652100

List of values

[2, 12, 110, 1274, 17136, 255816, 4124406, 70549050, 1264752060, 23555382240, 452806924752, 8939481277552, 180551099694400, 3719061442253520, 77933728043586630, 1658001861319441050, 35749633305661575300, 780123576993991461000, 17208112644166765652100]