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A129864 Numbers that are both lucky and emirp. 1
13, 31, 37, 73, 79, 739, 769, 937, 991, 1009, 1021, 1201, 1231, 1249, 1471, 1597, 1723, 1831, 1879, 1933, 3049, 3109, 3121, 3163, 3301, 3433, 3571, 3613, 3697, 3889, 7207, 7321, 7459, 7507, 7603, 7687, 7717, 7951, 7963, 9349, 9403, 9421, 9547, 9613, 9643 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

LINKS

Amiram Eldar, Table of n, a(n) for n = 1..10000

FORMULA

A000959 INTERSECTION A006567. a(n) is n element of A000959 AND a(n) is an element of A000040 AND R(a(n)) = A004086(a(n)) is an element of A000040.

EXAMPLE

a(9) = 1009 because 1009 is a lucky number A000959(154) and 1009 is an emirp because 1009 is prime and R(1009) = 9001 is prime (but is not lucky).

CROSSREFS

Cf. A000040, A000959, A004086, A006567, A031157.

Sequence in context: A040086 A176181 A023274 * A080387 A100589 A111489

Adjacent sequences:  A129861 A129862 A129863 * A129865 A129866 A129867

KEYWORD

base,easy,nonn,less

AUTHOR

Jonathan Vos Post, May 23 2007

EXTENSIONS

Corrected and extended by R. J. Mathar, Jun 12 2007

STATUS

approved

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Last modified August 8 04:32 EDT 2020. Contains 336290 sequences. (Running on oeis4.)