a(0)=2. For n>=1, a(n) = a(n-1) + n if a(n-1) is composite; a(n) = a(n-1)*n if a(n-1) is prime.

Terms

a(0) =2a(1) =2a(2) =4a(3) =7a(4) =28a(5) =33a(6) =39a(7) =46a(8) =54a(9) =63a(10) =73a(11) =803a(12) =815a(13) =828a(14) =842a(15) =857a(16) =13712a(17) =13729a(18) =247122a(19) =247141a(20) =4942820a(21) =4942841a(22) =4942863a(23) =4942886a(24) =4942910a(25) =4942935a(26) =4942961a(27) =4942988a(28) =4943016a(29) =4943045