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

20, 30, 0, 10, 0, 0

Offset

0,1

Links

Table of n, a(n) for n=0..5.

Example

a(0)=20 because we have 20 different permutation matrices 5 x 5 with trace 0 and determinant -1.

Crossrefs

A171806, A171808, A171809, A171906, A171907

Sequence in context: A113621 A166676 A125561 * A338158 A107714 A029721

Adjacent sequences: A171905 A171906 A171907 * A171909 A171910 A171911

Keyword

fini,full,nonn

Author

Artur Jasinski, Dec 31 2009

Status

approved