T(n,k)=Number of (n+1)X(k+1) 0..3 arrays with no 2X2 subblock having equal diagonal elements or equal antidiagonal elements.

A203826

T(n,k)=Number of (n+1)X(k+1) 0..3 arrays with no 2X2 subblock having equal diagonal elements or equal antidiagonal elements.

Terms

    a(0) =144a(1) =1296a(2) =1296a(3) =11664a(4) =27216a(5) =11664a(6) =104976a(7) =571536a(8) =571536a(9) =104976a(10) =944784a(11) =12002256a(12) =28005264a(13) =12002256a(14) =944784a(15) =8503056a(16) =252047376a(17) =1372257936a(18) =1372257936a(19) =252047376a(20) =8503056a(21) =76527504a(22) =5292994896a(23) =67240638864

External references