n*10^2-1, n*10^2-3, n*10^2-7 and n*10^2-9 are all prime.

Terms

a(0) =2a(1) =695a(2) =797a(3) =1193a(4) =2015a(5) =2480a(6) =3005a(7) =3020a(8) =3464a(9) =3887a(10) =6338a(11) =6575a(12) =6611a(13) =6803a(14) =7394a(15) =7682a(16) =7958a(17) =9074a(18) =10436a(19) =10940a(20) =11468a(21) =12284a(22) =13226a(23) =15773a(24) =17495a(25) =18374a(26) =19799a(27) =20792a(28) =22028a(29) =23036