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%I #5 Sep 08 2018 16:08:06
%S 1,2,6,18,53,158,486,1550,5109,17298,59799,210048,746983,2682618,
%T 9711214,35390422,129710309,477769754,1767525315,6564644688,
%U 24467315575,91484660770,343063807931,1289912535908,4861963178643,18367386626558,69533618024841,263748085968060
%N Row sums of triangle A132789.
%H Andrew Howroyd, <a href="/A132790/b132790.txt">Table of n, a(n) for n = 1..200</a>
%F a(n) = Sum_{k=1..n} binomial(n-1,k-1)*(1 + binomial(n,k-1)/k) - 1. - _Andrew Howroyd_, Sep 01 2018
%e a(4) = 18 = sum of row 4 terms of triangle A132789: (1 + 8 + 8 + 1).
%o (PARI) a(n)=sum(k=1, n, binomial(n-1,k-1)*(1 + binomial(n,k-1)/k) - 1); \\ _Andrew Howroyd_, Sep 01 2018
%Y Cf. A132789.
%K nonn
%O 1,2
%A _Gary W. Adamson_, Aug 30 2007
%E Terms a(11) and beyond from _Andrew Howroyd_, Sep 01 2018