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

 

Logo


Hints
(Greetings from The On-Line Encyclopedia of Integer Sequences!)
A100633 Primes that are the decimal concatenation of three separate primes. 0
257, 523, 1123, 1153, 1327, 1373, 1723, 1753, 1973, 2113, 2137, 2237, 2293, 2297, 2311, 2341, 2347, 2357, 2371, 2377, 2383, 2389, 2417, 2437, 2473, 2477, 2531, 2543, 2579, 2593, 2617, 2677, 2711, 2713, 2719, 2729, 2731, 2741, 2753, 2767, 2789, 2797 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

LINKS

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

MATHEMATICA

(*first do *) Needs["DiscreteMath`Combinatorica`"] (* then *) t = KSubsets[ Prime[ Range[25]], 3]; lst = {}; Do[k = 1; u = Permutations[ t[[n]]]; While[k < 7, v = FromDigits[ Flatten[IntegerDigits /@ u[[k]]]]; If[ PrimeQ[v], AppendTo[lst, v]]; k++ ], {n, Binomial[25, 3]}]; Take[ Union[lst], 42]

CROSSREFS

Cf. A100607.

Sequence in context: A158231 A070815 A095321 * A007765 A250726 A142291

Adjacent sequences:  A100630 A100631 A100632 * A100634 A100635 A100636

KEYWORD

nonn,base

AUTHOR

Robert G. Wilson v, Dec 03 2004

EXTENSIONS

Edited by Charles R Greathouse IV, Apr 29 2010

STATUS

approved

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

License Agreements, Terms of Use, Privacy Policy. .

Last modified September 18 11:42 EDT 2018. Contains 315130 sequences. (Running on oeis4.)