A159903 - OEIS

%I #5 Aug 09 2015 15:00:20

%S 4,48,489,48912,4891216,489121618,48912161820,4891216182024,

%T 489121618202425,48912161820242527,4891216182024252728,

%U 489121618202425272832,48912161820242527283236

%N Concatenation of the first n nonsquarefree numbers A013929.

%e a(4) = 48912 is the concatenation 4//8//9//12 of A013929(1) to A013929(4).

%Y Cf. A013929.

%K nonn,base,less

%O 1,1

%A _Jaroslav Krizek_, Apr 25 2009

%E Slightly edited by _R. J. Mathar_, Apr 28 2009