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) =2a(2) =2a(3) =3a(4) =5a(5) =7a(6) =10a(7) =16a(8) =25a(9) =41a(10) =65a(11) =105a(12) =169a(13) =274a(14) =443a(15) =720a(16) =1169a(17) =1898a(18) =3082a(19) =5007a(20) =8135a(21) =13216a(22) =21473a(23) =34891a(24) =56692a(25) =92118a(26) =149682a(27) =243219a(28) =395210a(29) =642182