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.

A254136 Indices of pentagonal numbers (A000326) which are also centered hexagonal numbers (A003215).

Table of values

n a(n)
1 1
2 73
3 889
4 84049
5 1025713
6 96992281
7 1183671721
8 111929008033
9 1365956140129
10 129165978277609
11 1576312202036953
12 149057427003352561
13 1819062915194503441
14 172012141595890577593
15 2099197027822254933769
16 198501862344230723189569
17 2422471551043966999065793

List of values

[1, 73, 889, 84049, 1025713, 96992281, 1183671721, 111929008033, 1365956140129, 129165978277609, 1576312202036953, 149057427003352561, 1819062915194503441, 172012141595890577593, 2099197027822254933769, 198501862344230723189569, 2422471551043966999065793]