T(n,k)=Number of (n+1)X(k+1) 0..1 arrays with 2X2 subblock sums lexicographically nondecreasing columnwise and rowwise.

A238255

T(n,k)=Number of (n+1)X(k+1) 0..1 arrays with 2X2 subblock sums lexicographically nondecreasing columnwise and rowwise.

Terms

    a(0) =16a(1) =44a(2) =44a(3) =121a(4) =180a(5) =121a(6) =286a(7) =804a(8) =804a(9) =286a(10) =676a(11) =2818a(12) =6828a(13) =2818a(14) =676a(15) =1482a(16) =9991a(17) =43456a(18) =43456a(19) =9991a(20) =1482a(21) =3249a(22) =29995a(23) =284992a(24) =523578a(25) =284992a(26) =29995a(27) =3249a(28) =6840a(29) =90225

External references