T(n,k)=1/729 the number of (n+2)X(k+2) 0..2 arrays with no 3X3 subblock trace equal to any horizontal or vertical neighbor 3X3 subblock trace.

A185891

T(n,k)=1/729 the number of (n+2)X(k+2) 0..2 arrays with no 3X3 subblock trace equal to any horizontal or vertical neighbor 3X3 subblock trace.

Terms

    a(0) =27a(1) =588a(2) =588a(3) =12900a(4) =28086a(5) =12900a(6) =282672a(7) =1367896a(8) =1367896a(9) =282672a(10) =6195480a(11) =66642628a(12) =151319356a(13) =66642628a(14) =6195480a(15) =135783240a(16) =3246601822a(17) =16772497838a(18) =16772497838a(19) =3246601822a(20) =135783240a(21) =2975926392a(22) =158165462152

External references