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A185104 Primes with property that each swapping any pair of digits also gives a prime. 0
11, 13, 17, 31, 37, 71, 73, 79, 97, 113, 131, 179, 199, 311, 337, 373, 733, 919, 991, 3911 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Conjecture: next terms are 1111111111111111111 and 11111111111111111111111.

LINKS

Table of n, a(n) for n=1..20.

EXAMPLE

Prime 179 is a term because 197 and 719 are also prime.

Prime 1913 is not a term because 9113 is not prime (even though 1193, 1319, 1931 and 3911 are primes).

CROSSREFS

Cf. A003459 (absolute primes).

Subsequence of A069706 (primes with property that swapping first and last digits also gives a prime).

Sequence in context: A105892 A111337 A266675 * A240570 A162237 A325870

Adjacent sequences:  A185101 A185102 A185103 * A185105 A185106 A185107

KEYWORD

nonn,base,less

AUTHOR

Jaroslav Krizek, Dec 26 2012

STATUS

approved

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Last modified August 10 13:12 EDT 2022. Contains 356039 sequences. (Running on oeis4.)