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a(n)=T(n,n), array T as in A049723.
0

%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_