a(n) = Sum_{j=1..prime(n)-1} floor(j^2/prime(n)).

Terms

a(0) =0a(1) =1a(2) =4a(3) =11a(4) =31a(5) =44a(6) =80a(7) =103a(8) =157a(9) =252a(10) =293a(11) =420a(12) =520a(13) =575a(14) =695a(15) =884a(16) =1105a(17) =1180a(18) =1431a(19) =1617a(20) =1704a(21) =2007a(22) =2217a(23) =2552a(24) =3040a(25) =3300a(26) =3439a(27) =3713a(28) =3852a(29) =4144