a(n) = (prime(1+n)*prime(n)) + prime(n) + 1.

Terms

a(0) =9a(1) =19a(2) =41a(3) =85a(4) =155a(5) =235a(6) =341a(7) =457a(8) =691a(9) =929a(10) =1179a(11) =1555a(12) =1805a(13) =2065a(14) =2539a(15) =3181a(16) =3659a(17) =4149a(18) =4825a(19) =5255a(20) =5841a(21) =6637a(22) =7471a(23) =8723a(24) =9895a(25) =10505a(26) =11125a(27) =11771a(28) =12427a(29) =14465