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.

A381646 a(n) = 4^n - 2*3^(n-1)*(n+3) + 2^(n-2)*(n^2+3*n+4).

Table of values

n a(n)
0 0
1 0
2 0
3 0
4 6
5 80
6 650
7 4172
8 23310
9 119016
10 571122
11 2621828
12 11651222
13 50536928
14 215219706
15 903799548
16 3754755102
17 15469272536
18 63320624642
19 257886717812
20 1046169235110
21 4230947198160
22 17069749295370
23 68738191563500
24 276393979740206

List of values

[0, 0, 0, 0, 6, 80, 650, 4172, 23310, 119016, 571122, 2621828, 11651222, 50536928, 215219706, 903799548, 3754755102, 15469272536, 63320624642, 257886717812, 1046169235110, 4230947198160, 17069749295370, 68738191563500, 276393979740206]