a(n) = a(n-1) + a(a(n-1) mod n) + 1, a(0) = 1.

Terms

a(0) =1a(1) =3a(2) =7a(3) =11a(4) =23a(5) =35a(6) =71a(7) =75a(8) =87a(9) =159a(10) =319a(11) =321a(12) =481a(13) =483a(14) =559a(15) =583a(16) =659a(17) =1143a(18) =1303a(19) =1625a(20) =1661a(21) =1669a(22) =3295a(23) =3367a(24) =3443a(25) =4747a(26) =5331a(27) =5813a(28) =6957a(29) =12289