A229770 - OEIS

%I #5 Dec 18 2015 18:18:42

%S 3,22,322,12958,2179956,1976588468,10811999412826,378274896023686216,

%T 88035611475274172311886,140618374201747733896872001960

%N Number of n X n 0..2 arrays with rows in lexicographically nondecreasing order and columns in nonincreasing order

%C Column 2 of A229774

%e Some solutions for n=3

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

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

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

%K nonn

%O 1,1

%A _R. H. Hardin_, Sep 29 2013