%I #6 Dec 18 2015 18:17:55
%S 1,29,9331,50432052,4585552158911,7383126698273869479
%N Number of n X n zerosum 2..2 arrays with rows and columns lexicographically nondecreasing
%C Diagonal of A201496
%e Some solutions for n=3
%e .2..0..1...2.2.1...1..0..1...2..0..2...1.1..0...2.1.1...2.1..2
%e .1..0..0...2..2..2...1..0..2....0.2..1...1..2..1....0.1..1...2..2..2
%e ..1..2.1....2..2.1....0.2..1....0.1..2....0..0..0....1..1..2...1..1.1
%K nonn
%O 1,2
%A _R. H. Hardin_ Dec 02 2011
