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.

A328604 G.f.: (1 + 7*x) / (1 - 2*x - 9*x^2).

Table of values

n a(n)
0 1
1 9
2 27
3 135
4 513
5 2241
6 9099
7 38367
8 158625
9 662553
10 2752731
11 11468439
12 47711457
13 198638865
14 826680843
15 3441111471
16 14322350529
17 59614704297
18 248130563355
19 1032793465383
20 4298762000961
21 17892665190369
22 74474188389387
23 309982363492095
24 1290232422488673
25 5370306116406201

List of values

[1, 9, 27, 135, 513, 2241, 9099, 38367, 158625, 662553, 2752731, 11468439, 47711457, 198638865, 826680843, 3441111471, 14322350529, 59614704297, 248130563355, 1032793465383, 4298762000961, 17892665190369, 74474188389387, 309982363492095, 1290232422488673, 5370306116406201]