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.

A053990 Numbers of the form x*(x + 1)*y*(y + 1) ("bipronics") where x and y are distinct.

Table of values

n a(n)
1 0
2 12
3 24
4 40
5 60
6 72
7 84
8 112
9 120
10 144
11 180
12 220
13 240
14 252
15 264
16 312
17 336
18 360
19 364
20 420
21 432
22 480
23 504
24 540
25 544
26 600
27 612
28 660
29 672
30 684
31 760
32 792
33 840
34 864
35 924
36 936
37 1012
38 1080
39 1092
40 1104
41 1120
42 1200
43 1260
44 1300
45 1320
46 1404
47 1440
48 1512
49 1584
50 1624

List of values

[0, 12, 24, 40, 60, 72, 84, 112, 120, 144, 180, 220, 240, 252, 264, 312, 336, 360, 364, 420, 432, 480, 504, 540, 544, 600, 612, 660, 672, 684, 760, 792, 840, 864, 924, 936, 1012, 1080, 1092, 1104, 1120, 1200, 1260, 1300, 1320, 1404, 1440, 1512, 1584, 1624]