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a(n) = (1/2) * Sum_{i=0..n} T(i,n-i), array T as in A049704.
1

%I #8 Aug 07 2021 00:07:59

%S 2,3,4,7,9,14,18,26,33,45,52,70,85,102,120,148,168,202,229,265,301,

%T 349,386,444,497,554,608,682,738,819,894,986,1078,1178,1263,1383,1499,

%U 1620,1725,1870,1989,2149,2289

%N a(n) = (1/2) * Sum_{i=0..n} T(i,n-i), array T as in A049704.

%K nonn

%O 3,1

%A _Clark Kimberling_