Sum of proper divisors minus the number of proper divisors of Fibonacci number A000045(n).

Terms

a(0) =0a(1) =0a(2) =0a(3) =0a(4) =0a(5) =4a(6) =0a(7) =8a(8) =17a(9) =14a(10) =0a(11) =245a(12) =0a(13) =40a(14) =499a(15) =542a(16) =0a(17) =2801a(18) =148a(19) =5316a(20) =6771a(21) =286a(22) =0a(23) =110809a(24) =18032a(25) =752a(26) =124327a(27) =155934a(28) =0a(29) =1310617