a(0) = 1; for n >= 1, a(n) = Sum_{j=0..a(n-1) mod n} a(j).

Terms

a(0) =1a(1) =1a(2) =2a(3) =4a(4) =1a(5) =2a(6) =4a(7) =9a(8) =2a(9) =4a(10) =9a(11) =30a(12) =15a(13) =4a(14) =9a(15) =30a(16) =97a(17) =84a(18) =84a(19) =26a(20) =15a(21) =127a(22) =308a(23) =30a(24) =15a(25) =127a(26) =898a(27) =24a(28) =913a(29) =97