Half the number of (n+1)X(n+1) binary arrays with no 2X2 subblock sum differing from a horizontal or vertical neighbor subblock sum by more than one.

A184605

Half the number of (n+1)X(n+1) binary arrays with no 2X2 subblock sum differing from a horizontal or vertical neighbor subblock sum by more than one.

Terms

    a(0) =8a(1) =160a(2) =8643a(3) =1396000a(4) =624608260a(5) =771907128421

External references