

A163558


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


3



1036, 1096, 1099, 1136, 1235, 1238, 1253, 1267, 1276, 1294, 1306, 1316, 1325, 1328, 1352, 1358, 1360, 1378, 1382, 1385, 1387, 1492, 1532, 1538, 1603, 1630, 1631, 1672, 1678, 1687, 1690, 1726, 1738, 1762, 1768, 1786, 1832, 1835, 1837, 1853, 1876, 1906
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OFFSET

1,1


LINKS

Table of n, a(n) for n=1..42.


EXAMPLE

a(1) = 1036 because 1036 is composite, the six permutations 163, 613, 631, 1063, 3061, and 6301 are all prime, and no other permutation of 1036 is prime.


CROSSREFS

Sequence in context: A175692 A023087 A219445 * A025412 A025409 A043388
Adjacent sequences: A163555 A163556 A163557 * A163559 A163560 A163561


KEYWORD

easy,nonn,base


AUTHOR

Gil Broussard, Jul 30 2009


STATUS

approved



