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.

A384640 Expansion of (1-3*x^2) / (1-x-5*x^2+x^3+2*x^4).

Table of values

n a(n)
0 1
1 1
2 3
3 7
4 19
5 49
6 131
7 343
8 911
9 2397
10 6347
11 16735
12 44251
13 116785
14 308611
15 814815
16 2152583
17 5684477
18 15015355
19 39655527
20 104742659
21 276635985
22 730663043
23 1929789255
24 5096983167
25 13461994429
26 35555794923
27 93909205391
28 248032219243
29 655098462417
30 1730238763395

List of values

[1, 1, 3, 7, 19, 49, 131, 343, 911, 2397, 6347, 16735, 44251, 116785, 308611, 814815, 2152583, 5684477, 15015355, 39655527, 104742659, 276635985, 730663043, 1929789255, 5096983167, 13461994429, 35555794923, 93909205391, 248032219243, 655098462417, 1730238763395]