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a(n) = Sum_{k=0..n} (k+1) * T(n, k), with T given by A026300.
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%I #9 Oct 18 2019 04:03:00

%S 1,3,11,38,129,429,1407,4563,14669,46823,148587,469226,1475669,

%T 4624437,14447703,45017082,139937301,434093367,1344076131,4154688864,

%U 12823246677,39524238741,121671304191,374126377473,1149197708385,3526577233659,10812501524627,33123904911608

%N a(n) = Sum_{k=0..n} (k+1) * T(n, k), with T given by A026300.

%K nonn

%O 0,2

%A _Clark Kimberling_

%E More terms from _Sean A. Irvine_, Oct 17 2019