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Number of cyclic primes with n digits.
1

%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