Number of (n+1)X4 0..3 arrays with every 2X2 subblock nonsingular.

A183704

Number of (n+1)X4 0..3 arrays with every 2X2 subblock nonsingular.

Terms

    a(0) =31800a(1) =4760784a(2) =710460576a(3) =106093597920

External references