A236720 - OEIS

%I #4 Jan 30 2014 06:46:45

%S 81,639,6879,127113,3413516,173486981,12274465993,2038592272997,

%T 393572287740663

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

%C Diagonal of A236728

%e Some solutions for n=4

%e ..0..1..0..1..0....1..1..0..2..1....2..1..1..1..0....0..1..0..1..0

%e ..1..1..1..1..1....0..2..1..1..0....1..2..0..2..1....2..2..2..2..2

%e ..0..1..2..1..0....1..1..0..2..1....2..1..1..1..2....2..1..0..1..2

%e ..1..1..1..1..1....0..2..1..1..0....1..2..0..2..1....0..2..2..2..2

%e ..1..0..1..2..1....1..1..0..2..1....1..0..2..0..1....1..2..1..0..1

%K nonn

%O 1,1

%A _R. H. Hardin_, Jan 30 2014