The OEIS mourns the passing of Jim Simons and is grateful to the Simons Foundation for its support of research in many branches of science, including the OEIS.
The OEIS is supported by the many generous donors to the OEIS Foundation.

 Hints (Greetings from The On-Line Encyclopedia of Integer Sequences!)
 A088618 Rearrangement of odd numbers such that every concatenation of at least two terms is composite. 0
 1, 5, 13, 3, 15, 9, 17, 7, 23, 19, 25, 35, 21, 39, 37, 11, 33, 45, 27, 47, 31, 51, 41, 55, 29, 43, 61, 59, 57, 53, 49, 63, 65, 75, 67, 71, 69, 79, 77, 81, 73, 85, 91, 95, 83, 97, 105, 87, 101, 99, 115, 107, 93, 123, 111, 117, 113, 109, 119, 103, 121, 125, 129, 135, 133, 137 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,2 COMMENTS Conjecture: Sequence is infinite. And every odd number is a member. LINKS Table of n, a(n) for n=1..66. EXAMPLE 15,513,133,315,1513,5133,13315,15133,513315,1513315 all are composite. CROSSREFS Sequence in context: A035412 A338985 A065865 * A121645 A057691 A297903 Adjacent sequences: A088615 A088616 A088617 * A088619 A088620 A088621 KEYWORD base,nonn AUTHOR Amarnath Murthy, Oct 17 2003 EXTENSIONS More terms from Ray Chandler, Oct 18 2003 STATUS approved

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

Last modified May 28 12:54 EDT 2024. Contains 372913 sequences. (Running on oeis4.)