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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.

A024206 Expansion of x^2*(1+x-x^2)/((1-x^2)*(1-x)^2).

Table of values

n a(n)
1 0
2 1
3 3
4 5
5 8
6 11
7 15
8 19
9 24
10 29
11 35
12 41
13 48
14 55
15 63
16 71
17 80
18 89
19 99
20 109
21 120
22 131
23 143
24 155
25 168
26 181
27 195
28 209
29 224
30 239
31 255
32 271
33 288
34 305
35 323
36 341
37 360
38 379
39 399
40 419
41 440
42 461
43 483
44 505
45 528
46 551
47 575
48 599
49 624
50 649
51 675
52 701
53 728
54 755
55 783
56 811
57 840

List of values

[0, 1, 3, 5, 8, 11, 15, 19, 24, 29, 35, 41, 48, 55, 63, 71, 80, 89, 99, 109, 120, 131, 143, 155, 168, 181, 195, 209, 224, 239, 255, 271, 288, 305, 323, 341, 360, 379, 399, 419, 440, 461, 483, 505, 528, 551, 575, 599, 624, 649, 675, 701, 728, 755, 783, 811, 840]

Started in 1964 by Neil J. A. Sloane | Maintained by The OEIS Foundation Inc.

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