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.

A128880 Triangular numbers congruent to 1 or 5 mod 6.

Table of values

n a(n)
1 1
2 55
3 91
4 253
5 325
6 595
7 703
8 1081
9 1225
10 1711
11 1891
12 2485
13 2701
14 3403
15 3655
16 4465
17 4753
18 5671
19 5995
20 7021
21 7381
22 8515
23 8911
24 10153
25 10585
26 11935
27 12403
28 13861
29 14365
30 15931
31 16471
32 18145
33 18721
34 20503
35 21115
36 23005
37 23653
38 25651
39 26335
40 28441

List of values

[1, 55, 91, 253, 325, 595, 703, 1081, 1225, 1711, 1891, 2485, 2701, 3403, 3655, 4465, 4753, 5671, 5995, 7021, 7381, 8515, 8911, 10153, 10585, 11935, 12403, 13861, 14365, 15931, 16471, 18145, 18721, 20503, 21115, 23005, 23653, 25651, 26335, 28441]