T(n,k)=Number of (n+1)X(k+1) 0..2 arrays with every 2X2 subblock sum differing from its neighbors horizontally, vertically and nw-se diagonally.

A253164

T(n,k)=Number of (n+1)X(k+1) 0..2 arrays with every 2X2 subblock sum differing from its neighbors horizontally, vertically and nw-se diagonally.

Terms

    a(0) =81a(1) =558a(2) =558a(3) =3844a(4) =5136a(5) =3844a(6) =26784a(7) =46752a(8) =46752a(9) =26784a(10) =186624a(11) =443362a(12) =555842a(13) =443362a(14) =186624a(15) =1296000a(16) =4189216a(17) =7252320a(18) =7252320a(19) =4189216a(20) =1296000a(21) =9000000a(22) =39478862a(23) =92998506a(24) =135741428a(25) =92998506a(26) =39478862a(27) =9000000a(28) =62568000

External references