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.

A181235 Number of (3*n)Xn binary matrices with all row sums equal and all column sums equal.

Table of values

n a(n)
1 2
2 22
3 3362
4 33235358
5 5210265060002
6 90698868503010138802

List of values

[2, 22, 3362, 33235358, 5210265060002, 90698868503010138802]