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a(n)=T(n,n+1), array T as in A049723.
0

%I #4 Mar 30 2012 18:56:56

%S 4,13,26,46,75,104,148,189,241,302,363,439,508,596,681,774,886,991,

%T 1107,1224,1344,1489,1622,1778,1919,2083,2248,2409,2605,2774,2970,

%U 3163,3356,3572,3785,4009,4246,4474,4719,4948,5220,5477

%N a(n)=T(n,n+1), array T as in A049723.

%K nonn

%O 0,1

%A _Clark Kimberling_