%I #4 Mar 30 2012 18:56:04
%S 2,4,8,15,42,127,376,1122,3344,9980,29796,89007,265986,795147,2377744,
%T 7112065,21277698,63670773,190560180,570416805,1707707142,5113158165,
%U 15311384784,45854766744,137339426436,411379964442,1232324471060
%N Sum{T(n,k)}, k = 0,1,...,n, where T is the array defined in A026082.
%Y For n>2, first differences of A026080.
%K nonn
%O 0,1
%A _Clark Kimberling_