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.

A072563 9*w(n) where : w(1)=w(2)=w(3)=1 w(n)=(w(n-1)*w(n-2)+(w(n-1)+w(n-2))/3) / w(n-3).

Table of values

n a(n)
1 9
2 9
3 9
4 15
5 23
6 51
7 93
8 225
9 429
10 1059
11 2039
12 5055
13 9753
14 24201
15 46713
16 115935
17 223799
18 555459
19 1072269
20 2661345
21 5137533
22 12751251
23 24615383
24 61094895
25 117939369
26 292723209
27 565081449
28 1402521135
29 2707467863
30 6719882451

List of values

[9, 9, 9, 15, 23, 51, 93, 225, 429, 1059, 2039, 5055, 9753, 24201, 46713, 115935, 223799, 555459, 1072269, 2661345, 5137533, 12751251, 24615383, 61094895, 117939369, 292723209, 565081449, 1402521135, 2707467863, 6719882451]