%I A073782
%S A073782 9,6,19,48,89,190,391,784,1577,3142,6219,12256,24041,46974,91471,
%T A073782 177568,343753,663814,1278979,2459152,4719417,9041470,17294039,
%U A073782 33030320,62999145,120006214,228327099,433939904,823854793,1562602238
%N A073782 a(n)=Sum[S(k)S(n-k), (k=0,..,n)], convolution of S(n) A001644 with itself.
%F A073782 G.f.: (3-2x-x^2)^2/(1-x-x^2-x^3)^2
%t A073782 CoefficientList[Series[(3-2x-x^2)^2/(1-x-x^2-x^3)^2, {x, 0, 40}], x]
%Y A073782 Cf. A001644.
%Y A073782 Sequence in context: A102648 A040074 A088999 this_sequence A156033 A038296 
               A058276
%Y A073782 Adjacent sequences: A073779 A073780 A073781 this_sequence A073783 A073784 
               A073785
%K A073782 easy,nonn
%O A073782 0,1
%A A073782 Mario Catalani (mario.catalani(AT)unito.it), Aug 11 2002