T(n,k)=Number of (n+1)X(k+1) 0..3 arrays with no 2X2 subblock sum equal to any horizontal or vertical neighbor 2X2 subblock sum.

A185575

T(n,k)=Number of (n+1)X(k+1) 0..3 arrays with no 2X2 subblock sum equal to any horizontal or vertical neighbor 2X2 subblock sum.

Terms

    a(0) =256a(1) =3392a(2) =3392a(3) =44944a(4) =125664a(5) =44944a(6) =598688a(7) =4649320a(8) =4649320a(9) =598688a(10) =7974976a(11) =173985944a(12) =480362772a(13) =173985944a(14) =7974976a(15) =106125920a(16) =6508370600a(17) =50465542904a(18) =50465542904a(19) =6508370600a(20) =106125920a(21) =1412256400a(22) =243047375432

External references