Sum of the squares of the first n nonsquarefree numbers (A013929).

Terms

a(0) =0a(1) =16a(2) =80a(3) =161a(4) =305a(5) =561a(6) =885a(7) =1285a(8) =1861a(9) =2486a(10) =3215a(11) =3999a(12) =5023a(13) =6319a(14) =7919a(15) =9855a(16) =11880a(17) =14184a(18) =16585a(19) =19085a(20) =21789a(21) =24705a(22) =27841a(23) =31441a(24) =35410a(25) =39506a(26) =44130a(27) =49314a(28) =54939a(29) =60715