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.

A228909 a(n) = 7^n - 6*6^n + 15*5^n - 20*4^n + 15*3^n - 6*2^n + 1.

Table of values

n a(n)
0 0
1 0
2 0
3 0
4 0
5 0
6 720
7 20160
8 332640
9 4233600
10 46070640
11 451725120
12 4115105280
13 35517081600
14 294293759760
15 2362955474880
16 18509835445920
17 142172988048000
18 1074905737084080
19 8023358912869440
20 59263889194762560
21 433988913576556800
22 3155502239364459600
23 22807773973299268800

List of values

[0, 0, 0, 0, 0, 0, 720, 20160, 332640, 4233600, 46070640, 451725120, 4115105280, 35517081600, 294293759760, 2362955474880, 18509835445920, 142172988048000, 1074905737084080, 8023358912869440, 59263889194762560, 433988913576556800, 3155502239364459600, 22807773973299268800]