%I #10 Mar 30 2012 19:00:16
%S 0,2,5,9,13,17,22,28,34,40,47,55,63,71,80,89,98,107,116,126,137,148,
%T 159,170,181,193,205,217,230,244,258,272,287,302,317,332,347,363,379,
%U 395,411,427,444,462,480,498,516,534,553,572,591,611,632
%N Sum of first n nonprimes minus their indices.
%C The sum of first n nonprimes is in A051349.
%C Partial sums of A073425. [From _Jaroslav Krizek_, Jun 27 2009]
%F a(n) = A051349(n)-n*(n+1)/2.
%F a(n) = a(n-1)+A018252(n)-n, a(1) = 0. - from Klaus Brockhaus, Dec 16 2010
%e a(1) = 1-1 = 0; a(2) = 0+4-2 = 2, a(3) = 2+6-3 = 5; a(4) = 5+8-4 = 9.
%Y Cf. A073425, A051349, A018252, A112997.
%K nonn,easy
%O 1,2
%A _Juri-Stepan Gerasimov_, Jun 14 2009