T(n,k)=Number of (n+1)X(k+1) 0..3 arrays with the upper median minus the lower median of every 2X2 subblock differing from its horizontal and vertical neighbors by exactly one.

A237574

T(n,k)=Number of (n+1)X(k+1) 0..3 arrays with the upper median minus the lower median of every 2X2 subblock differing from its horizontal and vertical neighbors by exactly one.

Terms

    a(0) =256a(1) =1876a(2) =1876a(3) =13924a(4) =24332a(5) =13924a(6) =103264a(7) =315664a(8) =315664a(9) =103264a(10) =769680a(11) =4146324a(12) =7379204a(13) =4146324a(14) =769680a(15) =5705156a(16) =54395184a(17) =173478980a(18) =173478980a(19) =54395184a(20) =5705156a(21) =42501300a(22) =712810024a(23) =4093774632a(24) =7415425124a(25) =4093774632

External references