A159903 Concatenation of the first n nonsquarefree numbers A013929.

4, 48, 489, 48912, 4891216, 489121618, 48912161820, 4891216182024, 489121618202425, 48912161820242527, 4891216182024252728, 489121618202425272832, 48912161820242527283236

Offset: 1

Author

Jaroslav Krizek, Apr 25 2009

Keywords

• nonn
• base
• less

Examples

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

Crossrefs

Cf. A013929.

Extensions

Slightly edited by R. J. Mathar, Apr 28 2009