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.

A253878 Indices of triangular numbers (A000217) which are also centered heptagonal numbers (A069099).

Table of values

n a(n)
1 1
2 22
3 358
4 5713
5 91057
6 1451206
7 23128246
8 368600737
9 5874483553
10 93623136118
11 1492095694342
12 23779907973361
13 378986431879441
14 6040003002097702
15 96261061601683798
16 1534136982624843073
17 24449930660395805377
18 389664753583708042966
19 6210186126678932882086

List of values

[1, 22, 358, 5713, 91057, 1451206, 23128246, 368600737, 5874483553, 93623136118, 1492095694342, 23779907973361, 378986431879441, 6040003002097702, 96261061601683798, 1534136982624843073, 24449930660395805377, 389664753583708042966, 6210186126678932882086]