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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.

A254708 Expansion of (1 + 2*x^2) / (1 - 2*x^2 - x^3 + 2*x^5 + 2*x^6 - x^8 - 2*x^9 + x^11) in powers of x.

Table of values

n a(n)
0 2
1 0
2 5
3 2
4 10
5 5
6 18
7 10
8 29
9 18
10 43
11 29
12 62
13 43
14 85
15 62
16 113
17 85
18 147
19 113
20 187
21 147
22 233
23 187
24 287
25 233
26 348
27 287
28 417
29 348
30 495
31 417
32 582
33 495
34 678
35 582
36 785
37 678
38 902
39 785
40 1030
41 902
42 1170
43 1030
44 1322
45 1170
46 1486
47 1322
48 1664
49 1486
50 1855
51 1664
52 2060
53 1855

List of values

[2, 0, 5, 2, 10, 5, 18, 10, 29, 18, 43, 29, 62, 43, 85, 62, 113, 85, 147, 113, 187, 147, 233, 187, 287, 233, 348, 287, 417, 348, 495, 417, 582, 495, 678, 582, 785, 678, 902, 785, 1030, 902, 1170, 1030, 1322, 1170, 1486, 1322, 1664, 1486, 1855, 1664, 2060, 1855]