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Partial sums of A109400.
1

%I #3 Mar 30 2012 18:50:50

%S 1,3,4,6,8,11,12,14,17,19,22,27,28,30,33,37,39,42,47,54,55,57,60,64,

%T 69,71,74,79,86,97,98,100,103,107,112,118,120,123,128,135,146,159,160,

%U 162,165,169,174,180,187,189,192,197,204,215,228,245,246

%N Partial sums of A109400.

%C a(n) = Sum(A109400(m): 1<=m<=n).

%Y Cf. A007504, A014370.

%K nonn

%O 1,2

%A _Reinhard Zumkeller_, Jun 27 2005