%I #7 Aug 11 2024 14:41:34
%S 4,9,12,8,10,12,0,0,0,0,0,0,0,0,0,0,0,0,1,0,0,0,1
%N Number of cyclic primes with n digits.
%C Every prime repunit is also a cyclic prime.
%H P. De Geest, <a href="https://www.worldofnumbers.com/circular.htm">Circular Primes</a>
%Y Cf. A004022, A004023, A068652.
%K nonn,base
%O 1,1
%A _Martin Renner_, Apr 12 2002
%E More terms from De Geest link by _Ray Chandler_, May 04 2017