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A069219 Number of cyclic primes with n digits. 1
4, 9, 12, 8, 10, 12, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 0, 0, 0, 1 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Every prime repunit is also a cyclic prime.

LINKS

Table of n, a(n) for n=1..23.

P. De Geest, Circular Primes

CROSSREFS

Cf. A004022, A004023, A068652.

Sequence in context: A085724 A106854 A099458 * A010413 A112652 A272933

Adjacent sequences:  A069216 A069217 A069218 * A069220 A069221 A069222

KEYWORD

nonn,base

AUTHOR

Martin Renner, Apr 12 2002

EXTENSIONS

More terms from De Geest link by Ray Chandler, May 04 2017

STATUS

approved

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Last modified May 29 13:14 EDT 2017. Contains 287247 sequences.