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%I #9 Oct 25 2019 04:57:32
%S 1,3,10,25,73,170,468,1050,2799,6138,16043,34644,89390,190913,488285,
%T 1034228,2628861,5532322,14000177,29311171,73936801,154145390,
%U 387911301,805899231,2024537328,4193625311,10521409964,21738996250
%N a(n) = Sum_{k=0..n} (k+1) * A026747(n, n-k).
%K nonn
%O 0,2
%A _Clark Kimberling_