T(n,k)=Number of (n+1)X(k+1) 0..5 arrays with every 2X2 subblock having equal diagonal elements or equal antidiagonal elements.

A203934

T(n,k)=Number of (n+1)X(k+1) 0..5 arrays with every 2X2 subblock having equal diagonal elements or equal antidiagonal elements.

Terms

    a(0) =396a(1) =4356a(2) =4356a(3) =47916a(4) =106596a(5) =47916a(6) =527076a(7) =2543436a(8) =2543436a(9) =527076a(10) =5797836a(11) =60873876a(12) =140120856a(13) =60873876a(14) =5797836a(15) =63776196a(16) =1456391916a(17) =7748585676a(18) =7748585676a(19) =1456391916a(20) =63776196a(21) =701538156a(22) =34845401556a(23) =428652828396

External references