T(n,k)=Number of (n+1)X(k+1) 0..3 arrays with the maximum plus the upper median minus the minimum of every 2X2 subblock equal.

A236979

T(n,k)=Number of (n+1)X(k+1) 0..3 arrays with the maximum plus the upper median minus the minimum of every 2X2 subblock equal.

Terms

    a(0) =256a(1) =1238a(2) =1238a(3) =6024a(4) =9854a(5) =6024a(6) =31008a(7) =76212a(8) =76212a(9) =31008a(10) =160764a(11) =635960a(12) =898820a(13) =635960a(14) =160764a(15) =849024a(16) =5259146a(17) =11850502a(18) =11850502a(19) =5259146a(20) =849024a(21) =4508480a(22) =44597946a(23) =151656752a(24) =255242808a(25) =151656752a(26) =44597946a(27) =4508480

External references