a(n+1) = a(n)+greatest prime divisor of a(n-1).

Terms

a(0) =1a(1) =1a(2) =2a(3) =3a(4) =5a(5) =8a(6) =13a(7) =15a(8) =28a(9) =33a(10) =40a(11) =51a(12) =56a(13) =73a(14) =80a(15) =153a(16) =158a(17) =175a(18) =254a(19) =261a(20) =388a(21) =417a(22) =514a(23) =653a(24) =910a(25) =1563a(26) =1576a(27) =2097a(28) =2294a(29) =2527