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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.

A171908 a(n)= Number of 5 X 5 permutation matrices with trace n and determinant -1.

Table of values

n	a(n)
0	20
1	30
2	0
3	10
4	0
5	0

List of values

[20, 30, 0, 10, 0, 0]

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