Sum of all proper divisors of all positive integers <= prime(n).

Terms

a(0) =0a(1) =0a(2) =2a(3) =7a(4) =23a(5) =38a(6) =69a(7) =89a(8) =133a(9) =227a(10) =268a(11) =397a(12) =483a(13) =536a(14) =632a(15) =821a(16) =1018a(17) =1125a(18) =1355a(19) =1511a(20) =1633a(21) =1890a(22) =2077a(23) =2406a(24) =2906a(25) =3150a(26) =3263a(27) =3509a(28) =3680a(29) =3960