Number of (n+2)X3 0..3 arrays with each 3X3 subblock nonsingular.

A184650

Number of (n+2)X3 0..3 arrays with each 3X3 subblock nonsingular.

Terms

    a(0) =212898a(1) =11826498a(2) =657272274a(3) =36516002466

External references