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Sum{T(n-k,k)}, 0<=k<=[ n/2 ], where T is the array in A026386.
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%I #12 Jun 13 2015 00:49:06

%S 1,2,3,6,10,17,31,53,92,163,282,492,863,1501,2621,4582,7987,13946,

%T 24354,42489,74179,129497,226000,394523,688670,1202020,2098239,

%U 3662553,6392969,11159290,19478867,34000750,59349706,103596641

%N Sum{T(n-k,k)}, 0<=k<=[ n/2 ], where T is the array in A026386.

%H <a href="/index/Rec#order_04">Index entries for linear recurrences with constant coefficients</a>, signature (0,1,3,1).

%F Pairwise sums of A026385. - _Ralf Stephan_, Jul 22 2003

%F G.f.: [(1+x)(1+x+x^2)]/[1-x^2-3x^3-x^4]. - _Ralf Stephan_, Apr 30 2004

%t LinearRecurrence[{0,1,3,1},{1,2,3,6},40] (* _Harvey P. Dale_, Apr 15 2015 *)

%K nonn

%O 0,2

%A _Clark Kimberling_