%I #3 Mar 30 2012 17:37:12
%S 1,1,1,0,3,28,485,11886,396277,17214856,944152281,63752343130,
%T 5192082859601,501340949329980,56567812054113373,7366464172601396422,
%U 1095342925750005427965,184246192159690980312976
%N Number of labeled vertically indecomposable lattices with a fixed bottom.
%F E.g.f. of a(n+1): A(x)=(B(x)-1)/B(x) where B(x) is e.g.f. of A058164(n+1).
%Y a(n)=A058803(n)/n=A058805(n)*(n-1).
%K nonn,hard
%O 0,5
%A _Christian G. Bower_, Dec 28 2000