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%I #16 Sep 17 2013 13:19:13
%S 5,3,9,17,129,2049,262145,536870913,140737488355329,
%T 75557863725914323419137,10633823966279326983230456482242756609,
%U 803469022129495137770981046170581301261101496891396417650689
%N a(n) = 2^L(n) + 1, where L(n) is A000032(n).
%F a(n+2) = a(n)*a(n+1) - a(n) - a(n+1) + 2.
%F Binet type formula: log_2(a(n)-1) = r^n - s^n where r and s are the roots of x^2-x-1 = 0. (This is true the definition).
%t Table[1 + 2^LucasL[n], {n, 0, 11}] (* _T. D. Noe_, Sep 17 2013 *)
%Y Cf. A000032.
%K nonn,easy
%O 0,1
%A M. Tamba and _Yeshwant Shivrai Valaulikar_, Sep 04 2013
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