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A236876 Number of (n+1)X(n+1) 0..2 arrays with the maximum plus the upper median plus the lower median of every 2X2 subblock equal 0

%I

%S 81,669,7900,316921,23065072,6486271600,3293624294420,

%T 4680935638464133,12732473276120266961

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

%C Diagonal of A236884

%e Some solutions for n=3

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

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

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

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

%K nonn

%O 1,1

%A _R. H. Hardin_, Feb 01 2014

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Last modified June 12 08:13 EDT 2021. Contains 344943 sequences. (Running on oeis4.)