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

A237791

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

Terms

    a(0) =256a(1) =1902a(2) =1902a(3) =14369a(4) =26230a(5) =14369a(6) =108626a(7) =367726a(8) =367726a(9) =108626a(10) =822482a(11) =5195344a(12) =9679862a(13) =5195344a(14) =822482a(15) =6206506a(16) =73170922a(17) =256311790a(18) =256311790a(19) =73170922a(20) =6206506a(21) =46951577a(22) =1029281994a(23) =6776019974a(24) =12795841200a(25) =6776019974

External references