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.

A216034 a(n) = 3^(-1+floor((n+1)/3))*A(n), where A(n) = 3*A(n-1) + A(n-2) - A(n-3)/3 with A(0)=A(1)=3, A(2)=11.

Table of values

n a(n)
0 1
1 1
2 11
3 35
4 115
5 1129
6 3697
7 12105
8 118907
9 389339
10 1274819
11 12522481
12 41002561
13 134255345
14 1318783307
15 4318113395
16 14138868147
17 138885370201
18 454754601649
19 1489010307001
20 14626471197755
21 47891689912619
22 156812530628611
23 1540361374197601

List of values

[1, 1, 11, 35, 115, 1129, 3697, 12105, 118907, 389339, 1274819, 12522481, 41002561, 134255345, 1318783307, 4318113395, 14138868147, 138885370201, 454754601649, 1489010307001, 14626471197755, 47891689912619, 156812530628611, 1540361374197601]