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a(n) = Sum_{k=0..n} (k+1) * A026692(n, k).
0

%I #9 Oct 21 2019 02:09:40

%S 1,3,8,20,54,147,368,873,2150,5401,12948,29952,71386,173370,406720,

%T 928013,2173248,5178906,11994740,27138972,62859236,147973950,

%U 339831168,764579850,1757600988,4102109109,9364407584,20984799649

%N a(n) = Sum_{k=0..n} (k+1) * A026692(n, k).

%K nonn

%O 0,2

%A _Clark Kimberling_