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%I #8 Feb 12 2014 18:24:28

%S 1,2,10,290,252010,190526868290,108901462620994495704010,

%T 35578585682975584013618831758290462042094536290,

%U 3797507277602505611886017656109365392377072888898472983341161302567287339676755374368286356010

%N A117805/3.

%F a(0)=1, a(n)=a(n-1)*(3*a(n-1)-1)

%t NestList[#(3#-1)&,1,10] (* _Harvey P. Dale_, Apr 01 2011 *)

%K easy,nonn

%O 0,2

%A _David Applegate_, Jun 05 2009