a(0)=1; for n > 0, a(n) = a(n-1) + a(prime(n)(mod n)), where prime(n) is the n-th prime.

Terms

a(0) =1a(1) =2a(2) =4a(3) =8a(4) =16a(5) =18a(6) =20a(7) =28a(8) =36a(9) =54a(10) =108a(11) =162a(12) =164a(13) =168a(14) =170a(15) =174a(16) =192a(17) =228a(18) =256a(19) =364a(20) =526a(21) =634a(22) =802a(23) =972a(24) =1200a(25) =2002a(26) =2974a(27) =3776a(28) =4748a(29) =5550