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.

A033580 Four times second pentagonal numbers: a(n) = 2*n*(3*n+1).

Table of values

n a(n)
0 0
1 8
2 28
3 60
4 104
5 160
6 228
7 308
8 400
9 504
10 620
11 748
12 888
13 1040
14 1204
15 1380
16 1568
17 1768
18 1980
19 2204
20 2440
21 2688
22 2948
23 3220
24 3504
25 3800
26 4108
27 4428
28 4760
29 5104
30 5460
31 5828
32 6208
33 6600
34 7004
35 7420
36 7848
37 8288
38 8740
39 9204
40 9680
41 10168
42 10668
43 11180
44 11704
45 12240

List of values

[0, 8, 28, 60, 104, 160, 228, 308, 400, 504, 620, 748, 888, 1040, 1204, 1380, 1568, 1768, 1980, 2204, 2440, 2688, 2948, 3220, 3504, 3800, 4108, 4428, 4760, 5104, 5460, 5828, 6208, 6600, 7004, 7420, 7848, 8288, 8740, 9204, 9680, 10168, 10668, 11180, 11704, 12240]