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%I #16 Jul 28 2020 11:12:34
%S 3,1,9,7,15,13,21,19,27,25,33,31,39,37,45,43,51,49,57,55,63,61,69,67,
%T 75,73,81,79,87,85,93,91,99,97,105,103,111,109,117,115,123,121,129,
%U 127,135,133,141,139,147,145,153,151,159,157,165,163,171,169,177,175,183
%N Terms of A047241 swapped in pairs.
%H <a href="/index/Rec#order_03">Index entries for linear recurrences with constant coefficients</a>, signature (1,1,-1).
%F a(n) = 6*n - a(n-1) - 2 (with a(0)=3). - _Vincenzo Librandi_, Nov 24 2010
%F From _Chai Wah Wu_, Jul 28 2020: (Start)
%F a(n) = a(n-1) + a(n-2) - a(n-3) for n > 2.
%F G.f.: (5*x^2 - 2*x + 3)/((x - 1)^2*(x + 1)). (End)
%K nonn,easy
%O 0,1
%A _Paul Curtz_, Mar 25 2008
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