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

A237167

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

Terms

    a(0) =81a(1) =245a(2) =245a(3) =777a(4) =997a(5) =777a(6) =2597a(7) =4365a(8) =4365a(9) =2597a(10) =8961a(11) =20669a(12) =25705a(13) =20669a(14) =8961a(15) =31837a(16) =102265a(17) =165317a(18) =165317a(19) =102265a(20) =31837a(21) =115561a(22) =525809a(23) =1096689a(24) =1470317a(25) =1096689a(26) =525809a(27) =115561a(28) =427093a(29) =2783881

External references