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

A237299

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

Terms

    a(0) =256a(1) =1128a(2) =1128a(3) =5360a(4) =7544a(5) =5360a(6) =27376a(7) =56752a(8) =56752a(9) =27376a(10) =145488a(11) =471588a(12) =685244a(13) =471588a(14) =145488a(15) =802992a(16) =4167736a(17) =9292680a(18) =9292680a(19) =4167736a(20) =802992a(21) =4552384a(22) =38817072a(23) =134597244a(24) =205544096a(25) =134597244a(26) =38817072a(27) =4552384

External references