%I A056469
%S A056469 2,3,4,6,10,18,34,66,130,258,514,1026,2050,4098,8194,16386,32770,65538,
%T A056469 131074,262146,524290,1048578,2097154,4194306,8388610,16777218,
%U A056469 33554434,67108866,134217730,268435458,536870914,1073741826,2147483650
%N A056469 Number of elements in the continued fraction for sum(k=0,n,1/2^2^k).
%F A056469 a(0)=2, n>0 a(n)=2^(n-1)+2=A052548(n-1)+2
%o A056469 (Other) sage: [floor(gaussian_binomial(n,1,2)+3) for n in xrange(-1,32)] 
               # [From Zerinvary Lajos (zerinvarylajos(AT)yahoo.com), May 31 2009]
%Y A056469 Cf. A007400. Apart from initial term, same as A052548. See also A089985.
%Y A056469 Sequence in context: A060163 A106511 A024490 this_sequence A004047 A093912 
               A134696
%Y A056469 Adjacent sequences: A056466 A056467 A056468 this_sequence A056470 A056471 
               A056472
%K A056469 nonn
%O A056469 0,1
%A A056469 Benoit Cloitre (benoit7848c(AT)orange.fr), Dec 07 2002