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

A238063

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

Terms

    a(0) =256a(1) =1910a(2) =1910a(3) =14429a(4) =26634a(5) =14429a(6) =109386a(7) =373572a(8) =373572a(9) =109386a(10) =828750a(11) =5318512a(12) =9814274a(13) =5318512a(14) =828750a(15) =6261150a(16) =75397960a(17) =262520800a(18) =262520800a(19) =75397960a(20) =6261150a(21) =47346273a(22) =1065216948a(23) =6977336094a(24) =13354392266a(25) =6977336094

External references