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a(n)=Ceiling[e^(n*(1+sqrt(5))/2)].
2

%I #7 Mar 12 2015 10:29:19

%S 6,26,129,647,3263,16453,82971,418433,2110227,10642223,53670491,

%T 270669172,1365029469,6884069717,34717503879,175086122783,

%U 882988319045,4453056354096,22457500812922,113256896535457,571173289481198

%N a(n)=Ceiling[e^(n*(1+sqrt(5))/2)].

%t Table[Ceiling[E^(n*GoldenRatio)],{n,30}] (* _Harvey P. Dale_, Mar 12 2015 *)

%Y Cf. A001622; A094214; A104457; A098317; A002390; A139339; A139340; A139341; A139342; A139345; A139346; A139347; A139348; A139349; A139350.

%K nonn

%O 1,1

%A _Mohammad K. Azarian_, May 13 2008