Primes of the form 210k + 31.

Terms

a(0) =31a(1) =241a(2) =661a(3) =1291a(4) =2131a(5) =2341a(6) =2551a(7) =2971a(8) =3181a(9) =3391a(10) =4021a(11) =4231a(12) =4441a(13) =4651a(14) =4861a(15) =5281a(16) =5701a(17) =6121a(18) =6961a(19) =7591a(20) =8011a(21) =8221a(22) =8431a(23) =8641a(24) =9901a(25) =10111a(26) =10321a(27) =10531a(28) =11161a(29) =12211