A109930 - OEIS

%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