T(n,k)=Number of (n+1)X(k+1) 0..2 arrays with every 2X2 subblock diagonal maximum minus antidiagonal maximum nondecreasing horizontally, vertically and ne-to-sw antidiagonally.

A254422

T(n,k)=Number of (n+1)X(k+1) 0..2 arrays with every 2X2 subblock diagonal maximum minus antidiagonal maximum nondecreasing horizontally, vertically and ne-to-sw antidiagonally.

Terms

    a(0) =81a(1) =470a(2) =470a(3) =2180a(4) =3279a(5) =2180a(6) =9623a(7) =25589a(8) =26783a(9) =9623a(10) =42669a(11) =229652a(12) =423141a(13) =238639a(14) =42669a(15) =192393a(16) =2128339a(17) =6880359a(18) =6683795a(19) =2182689a(20) =192393a(21) =876277a(22) =19879926a(23) =109896298a(24) =199339608a(25) =106821947a(26) =20251190a(27) =876277a(28) =4010555

External references