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

A236198

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

Terms

    a(0) =256a(1) =2936a(2) =2936a(3) =33546a(4) =76340a(5) =33546a(6) =384948a(7) =1971348a(8) =1971348a(9) =384948a(10) =4420718a(11) =51179036a(12) =114241318a(13) =51179036a(14) =4420718a(15) =50726030a(16) =1330663048a(17) =6664918820a(18) =6664918820a(19) =1330663048a(20) =50726030a(21) =582030405a(22) =34586439766a(23) =390311787452

External references