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

A235893

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

Terms

    a(0) =40a(1) =112a(2) =112a(3) =352a(4) =232a(5) =352a(6) =1216a(7) =568a(8) =568a(9) =1216a(10) =4480a(11) =1624a(12) =1096a(13) =1624a(14) =4480a(15) =17152a(16) =5272a(17) =2536a(18) =2536a(19) =5272a(20) =17152a(21) =67072a(22) =18712a(23) =6952a(24) =4744a(25) =6952a(26) =18712a(27) =67072a(28) =265216a(29) =70168

External references