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.

A153875 3 times 13-gonal (or tridecagonal) numbers: a(n) = 3*n*(11*n - 9)/2.

Table of values

n a(n)
0 0
1 3
2 39
3 108
4 210
5 345
6 513
7 714
8 948
9 1215
10 1515
11 1848
12 2214
13 2613
14 3045
15 3510
16 4008
17 4539
18 5103
19 5700
20 6330
21 6993
22 7689
23 8418
24 9180
25 9975
26 10803
27 11664
28 12558
29 13485
30 14445
31 15438
32 16464
33 17523
34 18615
35 19740
36 20898
37 22089

List of values

[0, 3, 39, 108, 210, 345, 513, 714, 948, 1215, 1515, 1848, 2214, 2613, 3045, 3510, 4008, 4539, 5103, 5700, 6330, 6993, 7689, 8418, 9180, 9975, 10803, 11664, 12558, 13485, 14445, 15438, 16464, 17523, 18615, 19740, 20898, 22089]

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

Content is available under The OEIS End-User License Agreement.