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Convolution of A023531 and A001950.
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%I #3 Mar 30 2012 18:55:52

%S 0,2,5,7,12,18,22,28,35,43,51,58,67,77,87,97,108,119,129,141,155,167,

%T 181,194,206,221,235,251,266,282,299,314,329,345,363,382,399,418,438,

%U 454,473,491,509,531,551,571,594,614,635,655,676,699,719

%N Convolution of A023531 and A001950.

%K nonn

%O 1,2

%A _Clark Kimberling_