Sum of composite divisors of n.

Terms

a(0) =0a(1) =0a(2) =0a(3) =4a(4) =0a(5) =6a(6) =0a(7) =12a(8) =9a(9) =10a(10) =0a(11) =22a(12) =0a(13) =14a(14) =15a(15) =28a(16) =0a(17) =33a(18) =0a(19) =34a(20) =21a(21) =22a(22) =0a(23) =54a(24) =25a(25) =26a(26) =36a(27) =46a(28) =0a(29) =61