A262783 -id:A262783 - cp's OEIS frontend

A329328 The squares in A329472.

4, 49, 1024, 11881, 15876, 29241, 23530332816, 90070213689, 165698657721, 233002186209, 8246098046404, 363533405168704, 24015392820628036, 48563553937960000, 6648251155785800089, 497199122464645742436, 749745222626569665409, 10925409774976373110009

Offset: 1

Metin Sariyar, Nov 15 2019

nonn

The first 18 terms are the sums of the first 1, 5, 27, 95, 110, 150, 135833, 265758, 360459, 427441, 2542860, 16883814, 137228168, 195143291, 2283242905, 19745293160, 24246846494, 92558706480 nonsquarefree numbers.

a(19) > 2*10^22. - Giovanni Resta, Nov 17 2019

			49 is a term because sum of first five nonsquarefree numbers is a square 4 + 8 + 9 + 12 + 16 = 49.

Cf. A000290, A262783, A329472.

p=0; Do[If[!SquareFreeQ[n],p=p+n; If[IntegerQ[p^(1/2)], Print[p]]], {n,1,10^8}]

lista(nn) = {my(s=0); for(k=1, nn, if(omega(k)!=bigomega(k), s+=k; if(issquare(s), print1(s, ", ")))); } \\ Jinyuan Wang, Nov 17 2019

Equals A000290 intersection A329472.

a(13)-a(18) from Giovanni Resta, Nov 17 2019

cp's OEIS Frontend

A329328 The squares in A329472.

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