login
The OEIS is supported by the many generous donors to the OEIS Foundation.

 

Logo
Hints
(Greetings from The On-Line Encyclopedia of Integer Sequences!)
A109930 Least palindromic multiple of concatenation 1,2,3,...n-1,n,n-1,...3,2,1. 0

%I #4 Dec 05 2013 19:57:01

%S 2,242,24642,2468642,1357997531,1123454543211,112345656543211,

%T 11234567676543211,1123456787876543211,112345678989876543211,

%U 1122345678989898765432211,11223345678989898987654332211

%N Least palindromic multiple of concatenation 1,2,3,...n-1,n,n-1,...3,2,1.

%C If c represents the concatenation then a(n) = m*c where m > 1.

%e a(5) = 1357997531= 11*123454321.

%K base,nonn

%O 1,1

%A _Amarnath Murthy_, Jul 18 2005

%E More terms from _Rick L. Shepherd_, Jul 22 2005

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.

License Agreements, Terms of Use, Privacy Policy. .

Last modified April 23 20:33 EDT 2024. Contains 371916 sequences. (Running on oeis4.)