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.

A201489 Number of n X n zero-sum -2..2 arrays with rows and columns lexicographically nondecreasing.

Table of values

n a(n)
1 1
2 29
3 9331
4 50432052
5 4585552158911
6 7383126698273869479

List of values

[1, 29, 9331, 50432052, 4585552158911, 7383126698273869479]