Number of (n+1)X(3+1) 0..3 arrays with every 2X2 subblock having the absolute values of all six edge and diagonal differences no larger than 1.

A234156

Number of (n+1)X(3+1) 0..3 arrays with every 2X2 subblock having the absolute values of all six edge and diagonal differences no larger than 1.

Terms

    a(0) =1108a(1) =21428a(2) =411712a(3) =7952532a(4) =153793284a(5) =2976757624a(6) =57647946980

External references