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.

A189743 a(1)=4, a(2)=4, a(n) = 4*a(n-1) + 4*a(n-2).

Table of values

n a(n)
1 4
2 4
3 32
4 144
5 704
6 3392
7 16384
8 79104
9 381952
10 1844224
11 8904704
12 42995712
13 207601664
14 1002389504
15 4839964672
16 23369416704
17 112837525504
18 544827768832
19 2630661177344
20 12701955784704
21 61330467848192
22 296129694531584
23 1429840649519104
24 6903881376202752

List of values

[4, 4, 32, 144, 704, 3392, 16384, 79104, 381952, 1844224, 8904704, 42995712, 207601664, 1002389504, 4839964672, 23369416704, 112837525504, 544827768832, 2630661177344, 12701955784704, 61330467848192, 296129694531584, 1429840649519104, 6903881376202752]