Earliest sequence such that (x+y) | a(xy) for all x>=1, y>=1.

Terms

a(0) =2a(1) =3a(2) =4a(3) =20a(4) =6a(5) =35a(6) =8a(7) =18a(8) =30a(9) =77a(10) =12a(11) =728a(12) =14a(13) =45a(14) =16a(15) =680a(16) =18a(17) =1881a(18) =20a(19) =252a(20) =110a(21) =299a(22) =24a(23) =3850a(24) =130a(25) =135a(26) =84a(27) =5104a(28) =30a(29) =75361