%I #4 Mar 30 2012 18:56:56
%S 1,6,15,35,56,88,121,162,214,267,331,396,461,553,634,734,827,931,1040,
%T 1153,1289,1414,1554,1691,1832,2004,2161,2329,2502,2678,2867,3056,
%U 3264,3469,3681,3902,4107,4351,4584,4840,5081,5330
%N a(n)=T(n,n), array T as in A049723.
%K nonn
%O 0,2
%A _Clark Kimberling_