Number of (n+1)X(3+1) 0..3 arrays with 2X2 edge jumps all no more than +1 in one of the clockwise or counterclockwise directions but not both.

A234764

Number of (n+1)X(3+1) 0..3 arrays with 2X2 edge jumps all no more than +1 in one of the clockwise or counterclockwise directions but not both.

Terms

    a(0) =916a(1) =9404a(2) =71280a(3) =760072a(4) =6340684a(5) =65760368a(6) =570633100a(7) =5760421980a(8) =51229946356a(9) =506912579200

External references