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

A253294

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

Terms

    a(0) =81a(1) =558a(2) =558a(3) =3844a(4) =3600a(5) =3844a(6) =26784a(7) =23546a(8) =23546a(9) =26784a(10) =186624a(11) =167832a(12) =140536a(13) =167832a(14) =186624a(15) =1296000a(16) =1184928a(17) =1029888a(18) =1029888a(19) =1184928a(20) =1296000a(21) =9000000a(22) =8243488a(23) =7431136a(24) =8153960a(25) =7431136a(26) =8243488a(27) =9000000a(28) =62568000a(29) =57474376

External references