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

A253231

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

Terms

    a(0) =16a(1) =47a(2) =47a(3) =125a(4) =132a(5) =125a(6) =335a(7) =306a(8) =306a(9) =335a(10) =907a(11) =742a(12) =494a(13) =742a(14) =907a(15) =2470a(16) =1775a(17) =914a(18) =914a(19) =1775a(20) =2470a(21) =6740a(22) =4158a(23) =1709a(24) =1498a(25) =1709a(26) =4158a(27) =6740a(28) =18406a(29) =9551

External references