Number of (n+2)X4 0..2 arrays with each 3X3 subblock nonsingular.

A184781

Number of (n+2)X4 0..2 arrays with each 3X3 subblock nonsingular.

Terms

    a(0) =260268a(1) =13313404a(2) =681288932a(3) =34797264276

External references