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

A236911

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

Terms

    a(0) =256a(1) =1056a(2) =1056a(3) =4448a(4) =6762a(5) =4448a(6) =19888a(7) =44836a(8) =44836a(9) =19888a(10) =89888a(11) =326868a(12) =451396a(13) =326868a(14) =89888a(15) =417488a(16) =2411550a(17) =5345722a(18) =5345722a(19) =2411550a(20) =417488a(21) =1956608a(22) =18527054a(23) =62508118a(24) =109900910a(25) =62508118a(26) =18527054a(27) =1956608a(28) =9312576

External references