T(n,k)=Number of (n+1)X(k+1) 0..2 arrays with every 2X2 subblock diagonal minus antidiagonal sum nondecreasing horizontally and vertically.

A253456

T(n,k)=Number of (n+1)X(k+1) 0..2 arrays with every 2X2 subblock diagonal minus antidiagonal sum nondecreasing horizontally and vertically.

Terms

    a(0) =81a(1) =414a(2) =414a(3) =1388a(4) =1975a(5) =1388a(6) =3639a(7) =4782a(8) =4782a(9) =3639a(10) =8501a(11) =8554a(12) =7782a(13) =8554a(14) =8501a(15) =19701a(16) =15220a(17) =11147a(18) =11147a(19) =15220a(20) =19701a(21) =48293a(22) =31630a(23) =19254a(24) =15730a(25) =19254a(26) =31630a(27) =48293a(28) =126357a(29) =74324

External references