a(n) = floor((a(n-2)*a(n-1))/(a(n-1)+a(n-2))) + a(n-1) + a(n-2), a(0) = 0, a(1) = 1, a(2) = 1, ...

Terms

a(0) =0a(1) =1a(2) =1a(3) =2a(4) =3a(5) =6a(6) =11a(7) =20a(8) =38a(9) =71a(10) =133a(11) =250a(12) =469a(13) =882a(14) =1657a(15) =3114a(16) =5852a(17) =10998a(18) =20669a(19) =38845a(20) =73004a(21) =137203a(22) =257857a(23) =484612a(24) =910773a(25) =1711693a(26) =3216930a(27) =6045851a(28) =11362482a(29) =21354481