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.

A256648 28-gonal pyramidal numbers: a(n) = n*(n+1)*(26*n-23)/6.

Table of values

n a(n)
0 0
1 1
2 29
3 110
4 270
5 535
6 931
7 1484
8 2220
9 3165
10 4345
11 5786
12 7514
13 9555
14 11935
15 14680
16 17816
17 21369
18 25365
19 29830
20 34790
21 40271
22 46299
23 52900
24 60100
25 67925
26 76401
27 85554
28 95410
29 105995
30 117335
31 129456
32 142384
33 156145
34 170765
35 186270
36 202686
37 220039
38 238355

List of values

[0, 1, 29, 110, 270, 535, 931, 1484, 2220, 3165, 4345, 5786, 7514, 9555, 11935, 14680, 17816, 21369, 25365, 29830, 34790, 40271, 46299, 52900, 60100, 67925, 76401, 85554, 95410, 105995, 117335, 129456, 142384, 156145, 170765, 186270, 202686, 220039, 238355]