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A163560
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Composite numbers such that exactly eight distinct permutations of digits give primes.
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2
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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
(list;
graph;
refs;
listen;
history;
text;
internal format)
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OFFSET
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1,1
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LINKS
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Zak Seidov, Table of n, a(n) for n = 1..4471
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MAPLE
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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.
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CROSSREFS
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Sequence in context: A061779 A218159 A023307 * A211684 A162023 A166957
Adjacent sequences: A163557 A163558 A163559 * A163561 A163562 A163563
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KEYWORD
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easy,nonn,base
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AUTHOR
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Gil Broussard, Jul 30 2009
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STATUS
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approved
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