%I A090856
%S A090856 1,7,27,104,378,1327,4553,15351,51072,168147,548915,1779377,5734022,
%T A090856 18384612,58688163,186632570,591509670,1869118923,5890466415,
%U A090856 18518945789,58094637801,181884111404,568416743474,1773443888599
%N A090856 a(n) is the least positive integer such that the integer part of the 
               arithmetic-geometric mean of a(n) and 1 is equal to 3^n.
%F A090856 floor( agm(a(n), 1) ) = 3^n, for n>=0.
%Y A090856 Cf. A090852, A090854, A090857.
%Y A090856 Sequence in context: A135914 A006350 A054485 this_sequence A055917 A056120 
               A048711
%Y A090856 Adjacent sequences: A090853 A090854 A090855 this_sequence A090857 A090858 
               A090859
%K A090856 nonn
%O A090856 0,2
%A A090856 Paul D. Hanna (pauldhanna(AT)juno.com), Dec 10 2003