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%I #3 Mar 30 2012 18:59:12
%S 1,3,14,68,347,1819,9712,52532,286905,1578679,8738278,48601968,
%T 271406347,1520725095,8545396208,48138689272,271768537793,
%U 1537212749339,8709732836238,49423440297324,280835252080651,1597731101233763
%N Diagonal sums of a Delannoy related triangle.
%C Diagonal sums of A113139.
%F a(n)=sum{k=0..floor(n/2), sum{j=0..n-k, C(n-2k, j)C(n-k+j, k+j)}}.
%K easy,nonn
%O 0,2
%A _Paul Barry_, Oct 15 2005
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