T(n,k)=Number of (n+1)X(k+1) 0..7 arrays with every 2X2 subblock having equal diagonal elements or equal antidiagonal elements.

A203732

T(n,k)=Number of (n+1)X(k+1) 0..7 arrays with every 2X2 subblock having equal diagonal elements or equal antidiagonal elements.

Terms

    a(0) =960a(1) =14400a(2) =14400a(3) =216000a(4) =539456a(5) =216000a(6) =3240000a(7) =19071424a(8) =19071424a(9) =3240000a(10) =48600000a(11) =681461824a(12) =1754118528a(13) =681461824a(14) =48600000a(15) =729000000a(16) =24301391808a(17) =161916229056a(18) =161916229056a(19) =24301391808a(20) =729000000a(21) =10935000000

External references