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%I #9 Oct 27 2019 19:55:32
%S 1,6,27,81,243,729,2187,6561,19683,59049,177147,531441,1594323,
%T 4782969,14348907,43046721,129140163,387420489,1162261467,3486784401,
%U 10460353203,31381059609,94143178827,282429536481,847288609443
%N a(n) = Sum_{k=0..2n} (k+1) * A026323(n, 2n-k).
%F For n>1, a(n) = 3^(n+1).
%K nonn
%O 0,2
%A _Clark Kimberling_
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