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

A236884

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

Terms

    a(0) =81a(1) =211a(2) =211a(3) =537a(4) =669a(5) =537a(6) =1523a(7) =2111a(8) =2111a(9) =1523a(10) =4309a(11) =7995a(12) =7900a(13) =7995a(14) =4309a(15) =12723a(16) =29673a(17) =40199a(18) =40199a(19) =29673a(20) =12723a(21) =37701a(22) =117703a(23) =189527a(24) =316921a(25) =189527a(26) =117703a(27) =37701a(28) =113771a(29) =462885

External references