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.

A228603 a(1) = 9, a(2) = 44, a(n) = 4*(a(n-1) + a(n-2)) (n >=3).

Table of values

n a(n)
1 9
2 44
3 212
4 1024
5 4944
6 23872
7 115264
8 556544
9 2687232
10 12975104
11 62649344
12 302497792
13 1460588544
14 7052345344
15 34051735552
16 164416323584
17 793872236544
18 3833154240512
19 18508105908224
20 89365040594944
21 431492586012672
22 2083430506430464
23 10059692369772544

List of values

[9, 44, 212, 1024, 4944, 23872, 115264, 556544, 2687232, 12975104, 62649344, 302497792, 1460588544, 7052345344, 34051735552, 164416323584, 793872236544, 3833154240512, 18508105908224, 89365040594944, 431492586012672, 2083430506430464, 10059692369772544]