T(n,k)=Number of (n+2)X(k+2) 0..1 arrays with every 3X3 subblock diagonal maximum plus antidiagonal minimum nondecreasing horizontally and vertically.

A253863

T(n,k)=Number of (n+2)X(k+2) 0..1 arrays with every 3X3 subblock diagonal maximum plus antidiagonal minimum nondecreasing horizontally and vertically.

Terms

    a(0) =512a(1) =3264a(2) =3264a(3) =19456a(4) =30848a(5) =19456a(6) =114880a(7) =291392a(8) =291392a(9) =114880a(10) =660480a(11) =2654464a(12) =4186496a(13) =2654464a(14) =660480a(15) =3727552a(16) =22951616a(17) =54933632a(18) =54933632a(19) =22951616a(20) =3727552a(21) =20872192a(22) =196953728a(23) =700079360a(24) =1095205120a(25) =700079360

External references