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

A237218

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

Terms

    a(0) =256a(1) =1076a(2) =1076a(3) =4770a(4) =6200a(5) =4770a(6) =22420a(7) =37858a(8) =37858a(9) =22420a(10) =107092a(11) =246916a(12) =316036a(13) =246916a(14) =107092a(15) =523218a(16) =1641592a(17) =2836058a(18) =2836058a(19) =1641592a(20) =523218a(21) =2580120a(22) =11208306a(23) =25995322a(24) =35342748a(25) =25995322a(26) =11208306a(27) =2580120a(28) =12870804

External references