%I A072713
%S A072713 1,1,1,1,1,2,3,7,43,1807,815861,147917502976,1339566593057489572791,
%T A072713 6793440021984612817314824762112917427331,
%U A072713 607759339422199886496126580428414916308278553796099069562650354036190535151
%N A072713 a(1)=a(2)=a(3)=a(4)=a(5)=1; a(n)*a(n-5) = a(n-1)*a(n-2)*a(n-3)*a(n-4)+1.
%Y A072713 Sequence in context: A051786 A133400 A113845 this_sequence A129871 A000058 
               A075442
%Y A072713 Adjacent sequences: A072710 A072711 A072712 this_sequence A072714 A072715 
               A072716
%K A072713 nonn
%O A072713 1,6
%A A072713 Benoit Cloitre (benoit7848c(AT)orange.fr), Aug 07 2002