

A163560


Composite numbers such that exactly eight distinct permutations of digits give primes.


2



1130, 1132, 1139, 1309, 1310, 1312, 1376, 1390, 1391, 1478, 1673, 1736, 1748, 1763, 1784, 1874, 1903, 1930, 2375, 2537, 2573, 2735, 3076, 3091, 3101, 3110, 3112, 3176, 3190, 3211, 3275, 3572, 3670, 3706, 3716, 3725, 3752, 3760, 3901, 3910, 4178, 4187
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OFFSET

1,1


LINKS

Zak Seidov, Table of n, a(n) for n = 1..4471


MAPLE

a(1) = 1130 because 1130 is composite and 113, 131, 311, 1013, 1031, 1103, 1301, and 3011 are prime permutations, and no other permutation of 1130 is prime.


CROSSREFS

Sequence in context: A061779 A218159 A023307 * A252287 A211684 A162023
Adjacent sequences: A163557 A163558 A163559 * A163561 A163562 A163563


KEYWORD

easy,nonn,base


AUTHOR

Gil Broussard, Jul 30 2009


STATUS

approved



