%I #23 Oct 21 2020 04:47:37
%S 12,30,50,74,104,140,180,222,270,324,380,440,506,576,648,726,806,890,
%T 978,1068,1164,1264,1366,1470,1578,1690,1804,1924,2050,2182,2320,2460,
%U 2604,2754,2910,3070,3232,3400,3574,3750,3930,4116,4308,4504,4702,4902
%N Partial sums of abundant numbers (A005101).
%C The first odd term is a(232)=112223, which is also prime.
%C The square terms begin: 324, 576, 17424, 1841449, ...
%H Michel Marcus, <a href="/A173107/b173107.txt">Table of n, a(n) for n = 1..10000</a>
%F a(n) ~ c * n^2, where c = 1/(2*A302991) = 2.0192... - _Amiram Eldar_, Oct 21 2020
%t abQ[n_]:=DivisorSigma[1,n]>2n; Accumulate[Select[Range[200],abQ]] (* _Harvey P. Dale_, Jan 27 2011 *)
%Y Cf. A000005, A005101, A173106, A302991.
%K easy,nonn
%O 1,1
%A _Jonathan Vos Post_, Feb 09 2010
%E Erroneous a(7) term corrected by _Jason G. Wurtzel_, Aug 12 2010