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.

A233333 Irregular array read by rows: A(n,k) = number of first coronas of a fixed rhombus r_{n,k} with characteristics of n-fold rotational symmetry in the Euclidean plane, n>=2, 1<=k<=floor(n/2), reduced for symmetry, as explained below.

Table of values

n a(n)
2 1
3 28
4 414
5 247

List of values

[1, 28, 414, 247]

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

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