a(n) = numerator of Sum_{d|n} 1/sigma(d).

Terms

a(0) =1a(1) =4a(2) =5a(3) =31a(4) =7a(5) =5a(6) =9a(7) =54a(8) =69a(9) =14a(10) =13a(11) =155a(12) =15a(13) =3a(14) =35a(15) =1709a(16) =19a(17) =23a(18) =21a(19) =31a(20) =45a(21) =13a(22) =25a(23) =27a(24) =223a(25) =10a(26) =703a(27) =93a(28) =31a(29) =35