%I A077458
%S A077458 1,1,1,1,3,5,19,111,735,16739,651829,98407827,87287056369,
%T A077458 513160504664273,68717836252612920369,358338159175285830378865425,
%U A077458 282106236246621697477649374210221427
%N A077458 a(n)=(a(n-1)*a(n-2)+a(n-2)*a(n-3)+1)/a(n-4).
%Y A077458 Sequence in context: A127998 A106918 A055452 this_sequence A062577 A076149 
               A133102
%Y A077458 Adjacent sequences: A077455 A077456 A077457 this_sequence A077459 A077460 
               A077461
%K A077458 nonn
%O A077458 1,5
%A A077458 Benoit Cloitre (benoit7848c(AT)orange.fr), Nov 30 2002