T(n,k)=Number of (n+2)X(k+2) 0..1 arrays with the (lower) median of each row and column nondecreasing.
A237738
T(n,k)=Number of (n+2)X(k+2) 0..1 arrays with the (lower) median of each row and column nondecreasing.
Terms
- a(0) =144a(1) =790a(2) =790a(3) =3720a(4) =13259a(5) =3720a(6) =18284a(7) =105639a(8) =105639a(9) =18284a(10) =83776a(11) =1707200a(12) =1659924a(13) =1707200a(14) =83776a(15) =389862a(16) =13980344a(17) =38387146a(18) =38387146a(19) =13980344a(20) =389862a(21) =1747320a(22) =219064013a(23) =639694176a(24) =3285354224a(25) =639694176a(26) =219064013a(27) =1747320
External references
- oeis: A237738