T(n,k)=Number of (n+1)X(k+1) 0..2 arrays with the upper median minus the lower median of every 2X2 subblock equal.

A236737

T(n,k)=Number of (n+1)X(k+1) 0..2 arrays with the upper median minus the lower median of every 2X2 subblock equal.

Terms

    a(0) =81a(1) =345a(2) =345a(3) =1497a(4) =2471a(5) =1497a(6) =6663a(7) =17583a(8) =17583a(9) =6663a(10) =29617a(11) =131147a(12) =203517a(13) =131147a(14) =29617a(15) =132471a(16) =975553a(17) =2541745a(18) =2541745a(19) =975553a(20) =132471a(21) =592001a(22) =7370761a(23) =31912919a(24) =55635639a(25) =31912919a(26) =7370761a(27) =592001a(28) =2651151a(29) =55873999

External references