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a(n) = Sum_{k=0..m} (k+1) * A026009(n, m-k) where m = floor(n/2)+1.
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%I #8 Oct 26 2019 23:09:18

%S 1,3,8,12,31,48,121,192,475,768,1872,3072,7398,12288,29295,49152,

%T 116179,196608,461284,786432,1833202,3145728,7290818,12582912,

%U 29014046,50331648,115521296,201326592,460153644,805306368,1833594171

%N a(n) = Sum_{k=0..m} (k+1) * A026009(n, m-k) where m = floor(n/2)+1.

%K nonn

%O 0,2

%A _Clark Kimberling_