Primes p such that |100-p|, |1000-p|, |10000-p| and |100000-p| are also primes.

Terms

a(0) =71a(1) =281a(2) =743a(3) =827a(4) =1151a(5) =1163a(6) =1193a(7) =1571a(8) =1877a(9) =3221a(10) =3671a(11) =7703a(12) =9719a(13) =9929a(14) =10433a(15) =10601a(16) =10613a(17) =10739a(18) =11789a(19) =11831a(20) =13163a(21) =15683a(22) =16661a(23) =19181a(24) =19433a(25) =22739a(26) =25439a(27) =26981a(28) =28211a(29) =33911