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%I #16 Oct 21 2020 02:55:50
%S 4,12,21,33,49,67,87,111,136,163,191,223,259,299,343,388,436,485,535,
%T 587,641,697,757,820,884,952,1024,1099,1175,1255,1336,1420,1508,1598,
%U 1690,1786,1884,1983,2083,2187,2295,2407,2523,2640,2760,2881,3005,3130,3256
%N Partial sums of numbers that are not squarefree.
%H Metin Sariyar, <a href="/A329472/b329472.txt">Table of n, a(n) for n = 1..16000</a>
%F a(n) ~ (Pi^2/(2*Pi^2 - 12)) * n^2. - _Amiram Eldar_, Oct 21 2020
%e 49 is a term because 4, 8, 9, 12, 16 are the first five nonsquarefree numbers and 4 + 8 + 9 + 12 + 16 = 49.
%t Accumulate[Select[Range[1000], !SquareFreeQ[#]&]]
%Y Partial sums of A013929.
%Y Cf. A005117, A173143.
%K nonn,easy
%O 1,1
%A _Metin Sariyar_, Nov 13 2019
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