a(n) = [ a(n-1)/a(1) + a(n-2)/a(2) + ... + a(1)/a(n-1) ], for n >= 3.

Terms

a(0) =2a(1) =2a(2) =2a(3) =3a(4) =4a(5) =5a(6) =7a(7) =10a(8) =13a(9) =18a(10) =25a(11) =35a(12) =48a(13) =67a(14) =93a(15) =129a(16) =179a(17) =249a(18) =346a(19) =481a(20) =668a(21) =928a(22) =1290a(23) =1792a(24) =2491a(25) =3462a(26) =4811a(27) =6686a(28) =9292a(29) =12913