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%I #4 Mar 30 2012 18:56:05
%S 9,13,18,24,39,57,78,102,117,146,164,198,219,258,282,326,373,402,454,
%T 509,543,603,666,705,773,844,888,964,1011,1092,1176,1228,1317,1372,
%U 1466,1563,1623,1725,1788,1895,2005,2073,2188,2259
%N a(n) = sum of the numbers between the two n's in A026280.
%K nonn
%O 1,1
%A _Clark Kimberling_
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