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%I #8 Sep 16 2015 13:01:50
%S 1,1,1,6,6,6,7,7,18,18,18,19,20,21,21,40,40,40,42,42,44,45,46,46,75,
%T 75,75,77,78,79,81,82,83,85,85,126,126,126,128,129,132,132,135,136,
%U 138,139,141,141,196,196,196,199,200,203,204,205,208,210,212,213,215,217,217
%N a(n) = Sum_{k=1..floor(sqrt(n))} floor(k*sqrt(n)).
%t Table[Sum[Floor[k*Sqrt[n]], {k, 1, Floor[Sqrt[n]]}], {n, 1, 75}] (* _Stefan Steinerberger_, Sep 18 2007 *)
%K nonn
%O 1,4
%A _Leroy Quet_, Sep 16 2007
%E More terms from _Stefan Steinerberger_, Sep 18 2007
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