%I A109743
%S A109743 1,3,9,41,231,1551,12037,105861,1039539,11268059,133585089,1718984673,
%T A109743 23857531519,355190381031,5646040979901,95432906354621,1709068974897867,
%U A109743 32325104169244851,643869687410800249,13471540400560532889,295384662114697463319
%N A109743 a(2)=1; for n>2, a(n) = A109742(n)/3.
%Y A109743 Cf. A000166, A109742.
%Y A109743 Sequence in context: A012099 A159039 A074502 this_sequence A139150 A113271 
               A057724
%Y A109743 Adjacent sequences: A109740 A109741 A109742 this_sequence A109744 A109745 
               A109746
%K A109743 nonn
%O A109743 2,2
%A A109743 N. J. A. Sloane (njas(AT)research.att.com), based on a suggestion from 
               Douglas Rogers, Aug 13 2005