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

A253495

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

Terms

    a(0) =81a(1) =414a(2) =414a(3) =1388a(4) =1377a(5) =1388a(6) =3639a(7) =3090a(8) =2640a(9) =3639a(10) =8501a(11) =5386a(12) =4196a(13) =4720a(14) =8501a(15) =19701a(16) =9679a(17) =6476a(18) =6931a(19) =9654a(20) =19701a(21) =48293a(22) =20975a(23) =11937a(24) =10477a(25) =13528a(26) =22236a(27) =48293a(28) =126357a(29) =51167

External references