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

Terms

a(0) =1a(1) =1a(2) =2a(3) =3a(4) =5a(5) =9a(6) =15a(7) =27a(8) =47a(9) =85a(10) =151a(11) =272a(12) =486a(13) =874a(14) =1569a(15) =2819a(16) =5063a(17) =9098a(18) =16345a(19) =29369a(20) =52769a(21) =94817a(22) =170368a(23) =306125a(24) =550055a(25) =988364a(26) =1775934a(27) =3191079a(28) =5733875a(29) =10302889