A274765 -id:A274765 - cp's OEIS frontend

A160561 Cyclops primes with circular digits {0,6,8,9}.

809, 66089, 68099, 86069, 88069, 89069, 99089, 6680689, 6680699, 6680969, 6690689, 6690899, 6690989, 6860869, 6860989, 6860999, 6890699, 6890969, 6960869, 6980669, 6980899, 6980969, 6990889, 8660689, 8660699, 8660969

Offset: 1

Ki Punches, May 19 2009

The sequence is probably infinite.
The sequence A134809 restricted to cases with digits 6, 8 or 9 (see A001743) at the off-center positions.
Primes in A274765. - Omar E. Pol, Jul 06 2016
Each term is equal to 9 mod 10. - Harvey P. Dale, Feb 02 2021

Kenny Lau, Table of n, a(n) for n = 1..20000

Intersection of A000040 (primes), A001743 (numbers with circular digits) and A134808 (cyclops numbers).
Also intersection of A043580 (primes with circular digits) and A134809 (cyclops primes).
Cf. A134808, A134809, A153807, A156200, A274765.

Select[Prime@ Range[10^6], And[OddQ@ Length@ #, Times @@ Boole@ Map[MemberQ[{0, 6, 8, 9}, #] &, Union@ #] == 1, Part[#, Ceiling[Length[#]/2]] == 0, Count[#, 0] == 1] &@ IntegerDigits@ # &] (* Michael De Vlieger, Jul 05 2016 *)
Table[Select[FromDigits/@(Flatten[Join[{Take[#,Length[#]/2],0,Take[#,-Length[#]/2]}]]&/@Tuples[{6,8,9},n]),PrimeQ],{n,2,6,2}]//Flatten (* Harvey P. Dale, Feb 02 2021 *)

Edited and corrected by Ray Chandler and R. J. Mathar, May 20 2009

Definition simplified by Omar E. Pol, Jun 05 2009

cp's OEIS Frontend

A160561 Cyclops primes with circular digits {0,6,8,9}.

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