T(n,k)=Number of (n+1)X(k+1) 0..6 arrays with every 2X2 subblock having equal diagonal elements or equal antidiagonal elements.

A203887

T(n,k)=Number of (n+1)X(k+1) 0..6 arrays with every 2X2 subblock having equal diagonal elements or equal antidiagonal elements.

Terms

    a(0) =637a(1) =8281a(2) =8281a(3) =107653a(4) =254359a(5) =107653a(6) =1399489a(7) =7501753a(8) =7501753a(9) =1399489a(10) =18193357a(11) =222645367a(12) =543848893a(13) =222645367a(14) =18193357a(15) =236513641a(16) =6601376089a(17) =39572771665a(18) =39572771665a(19) =6601376089a(20) =236513641a(21) =3074677333a(22) =195759462871

External references