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.

A051865 13-gonal (or tridecagonal) numbers: a(n) = n*(11*n - 9)/2.

Table of values

n a(n)
0 0
1 1
2 13
3 36
4 70
5 115
6 171
7 238
8 316
9 405
10 505
11 616
12 738
13 871
14 1015
15 1170
16 1336
17 1513
18 1701
19 1900
20 2110
21 2331
22 2563
23 2806
24 3060
25 3325
26 3601
27 3888
28 4186
29 4495
30 4815
31 5146
32 5488
33 5841
34 6205
35 6580
36 6966
37 7363
38 7771
39 8190
40 8620
41 9061
42 9513

List of values

[0, 1, 13, 36, 70, 115, 171, 238, 316, 405, 505, 616, 738, 871, 1015, 1170, 1336, 1513, 1701, 1900, 2110, 2331, 2563, 2806, 3060, 3325, 3601, 3888, 4186, 4495, 4815, 5146, 5488, 5841, 6205, 6580, 6966, 7363, 7771, 8190, 8620, 9061, 9513]

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

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