login
This site is supported by donations to The OEIS Foundation.

 

Logo

Annual Appeal: Today, Nov 11 2014, is the 4th anniversary of the launch of the new OEIS web site. 70,000 sequences have been added in these four years, all edited by volunteers. Please make a donation (tax deductible in the US) to help keep the OEIS running.

Hints
(Greetings from The On-Line Encyclopedia of Integer Sequences!)
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 (list; graph; refs; listen; history; text; internal format)
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

Lookup | Welcome | Wiki | Register | Music | Plot 2 | Demos | Index | Browse | More | WebCam
Contribute new seq. or comment | Format | Transforms | Superseeker | Recent | More pages
The OEIS Community | Maintained by The OEIS Foundation Inc.

Content is available under The OEIS End-User License Agreement .

Last modified December 22 05:04 EST 2014. Contains 252328 sequences.