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.

A253579 Centered pentagonal numbers (A005891) which are also centered octagonal numbers (A016754).

Table of values

n a(n)
1 1
2 22801
3 1666681
4 47411143081
5 3465632747641
6 98584929298781641
7 7206305041398228481
8 204993755756525779060081
9 14984516863488437537571601
10 426256225957302372068628976801
11 31158234954289838149958560780201
12 886340998518823181233611960679431001

List of values

[1, 22801, 1666681, 47411143081, 3465632747641, 98584929298781641, 7206305041398228481, 204993755756525779060081, 14984516863488437537571601, 426256225957302372068628976801, 31158234954289838149958560780201, 886340998518823181233611960679431001]

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

Content is available under The OEIS End-User License Agreement.