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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.

A182568 a(n) = 2*floor(n/4)*(n - 2*(1 + floor(n/4))).

Table of values

n a(n)
0 0
1 0
2 0
3 0
4 0
5 2
6 4
7 6
8 8
9 12
10 16
11 20
12 24
13 30
14 36
15 42
16 48
17 56
18 64
19 72
20 80
21 90
22 100
23 110
24 120
25 132
26 144
27 156
28 168
29 182
30 196
31 210
32 224
33 240
34 256
35 272
36 288
37 306
38 324
39 342
40 360
41 380
42 400
43 420
44 440
45 462
46 484
47 506
48 528
49 552
50 576
51 600
52 624
53 650
54 676
55 702
56 728
57 756
58 784
59 812
60 840
61 870
62 900
63 930
64 960
65 992
66 1024
67 1056
68 1088
69 1122
70 1156
71 1190
72 1224
73 1260
74 1296
75 1332
76 1368

List of values

[0, 0, 0, 0, 0, 2, 4, 6, 8, 12, 16, 20, 24, 30, 36, 42, 48, 56, 64, 72, 80, 90, 100, 110, 120, 132, 144, 156, 168, 182, 196, 210, 224, 240, 256, 272, 288, 306, 324, 342, 360, 380, 400, 420, 440, 462, 484, 506, 528, 552, 576, 600, 624, 650, 676, 702, 728, 756, 784, 812, 840, 870, 900, 930, 960, 992, 1024, 1056, 1088, 1122, 1156, 1190, 1224, 1260, 1296, 1332, 1368]

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