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a(n) = Sum_{k=0..n} (k+1) * A026769(n, k).
0

%I #9 Oct 26 2019 16:17:03

%S 1,3,8,22,55,143,349,885,2138,5356,12890,32092,77178,191530,460934,

%T 1141888,2751551,6809421,16431189,40633227,98175341,242626935,

%U 586867463,1449457735,3509084995,8661201115,20982916461,51755457003

%N a(n) = Sum_{k=0..n} (k+1) * A026769(n, k).

%K nonn

%O 0,2

%A _Clark Kimberling_