a(n) = numerator of the fraction whose Engel expansion has the positive divisors of n as its terms.

Terms

a(0) =1a(1) =3a(2) =4a(3) =13a(4) =6a(5) =61a(6) =8a(7) =105a(8) =37a(9) =161a(10) =12a(11) =2965a(12) =14a(13) =309a(14) =316a(15) =1681a(16) =18a(17) =9901a(18) =20a(19) =13221a(20) =610a(21) =749a(22) =24a(23) =569401a(24) =151a(25) =1041a(26) =1000a(27) =36093a(28) =30a(29) =1381981