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.

A254782 Indices of centered hexagonal numbers (A003215) which are also centered pentagonal numbers (A005891).

Table of values

n a(n)
1 1
2 11
3 231
4 5061
5 111101
6 2439151
7 53550211
8 1175665481
9 25811090361
10 566668322451
11 12440892003551
12 273132955755661
13 5996484134620981
14 131649518005905911
15 2890292911995309051
16 63454794545890893201
17 1393115187097604341361
18 30585079321601404616731

List of values

[1, 11, 231, 5061, 111101, 2439151, 53550211, 1175665481, 25811090361, 566668322451, 12440892003551, 273132955755661, 5996484134620981, 131649518005905911, 2890292911995309051, 63454794545890893201, 1393115187097604341361, 30585079321601404616731]

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

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