T(n,k)=Number of (n+1)X(k+1) 0..3 arrays with no 2X2 subblock having the sum of its diagonal elements less than the minimum of its antidiagonal elements.
A251491
T(n,k)=Number of (n+1)X(k+1) 0..3 arrays with no 2X2 subblock having the sum of its diagonal elements less than the minimum of its antidiagonal elements.
Terms
- a(0) =236a(1) =3456a(2) =3456a(3) =50576a(4) =186304a(5) =50576a(6) =740096a(7) =10046784a(8) =10046784a(9) =740096a(10) =10830016a(11) =541815424a(12) =1996407424a(13) =541815424a(14) =10830016a(15) =158478336a(16) =29219848960a(17) =396684056960a(18) =396684056960a(19) =29219848960a(20) =158478336a(21) =2319053056
External references
- oeis: A251491