|
%I #15 Jul 03 2023 08:55:17
%S 2,3,6,10,18,34,66,130,258,514,1026,2050,4098,8194,16386,32770,65538,
%T 131074,262146,524290,1048578,2097154,4194306,8388610,16777218,
%U 33554434,67108866,134217730,268435458,536870914,1073741826,2147483650
%N a(n) = A089709(n+1)/A089709(n).
%H Vincenzo Librandi, <a href="/A089985/b089985.txt">Table of n, a(n) for n = 1..2000</a>
%H <a href="/index/Rec#order_02">Index entries for linear recurrences with constant coefficients</a>, signature (3, -2).
%F a(n) = 2^(n-1)+2, n>2.
%t Join[{2,3},Rest[2^Range[40]+2]] (* _Harvey P. Dale_, Sep 19 2011 *)
%Y Cf. A089709.
%Y Essentially the same as A056469.
%K nonn,easy
%O 1,1
%A _Ray Chandler_, Nov 21 2003
|
