T(n,k)=Number of (n+1)X(k+1) 0..1 arrays with rows and columns of determinants of all 2X2 subblocks lexicographically nondecreasing.

A204800

T(n,k)=Number of (n+1)X(k+1) 0..1 arrays with rows and columns of determinants of all 2X2 subblocks lexicographically nondecreasing.

Terms

    a(0) =16a(1) =47a(2) =47a(3) =125a(4) =240a(5) =125a(6) =335a(7) =1001a(8) =1001a(9) =335a(10) =907a(11) =4273a(12) =6537a(13) =4273a(14) =907a(15) =2470a(16) =18550a(17) =42214a(18) =42214a(19) =18550a(20) =2470a(21) =6740a(22) =81009a(23) =270148a(24) =422426a(25) =270148a(26) =81009a(27) =6740a(28) =18406a(29) =353975

External references