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a(1)=2, a(2)=2, a(n)=2*a(n-2)*a(n-1)-a(n-2)-a(n-1).
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%I #2 Mar 31 2012 12:38:28

%S 2,2,4,10,66,1244,162898,405126082,131988051722292,

%T 106943604398142563191514,28230555977340642743866391573263146370,

%U 6038154820760673175690853635193471535603786459126013221470476

%N a(1)=2, a(2)=2, a(n)=2*a(n-2)*a(n-1)-a(n-2)-a(n-1).

%t a=2;b=2;lst={a,b};Do[c=2*a*b-a-b;AppendTo[lst,c];a=b;b=c,{n,12}];lst

%Y Cf. A173093, A173094, A173096, A173097, A173098, A173099

%K nonn

%O 1,1

%A _Vladimir Joseph Stephan Orlovsky_, Feb 09 2010