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1,2

Table of n, a(n) for n=1..65.

A005117 INTERSECT A167707. [From R. J. Mathar, Apr 24 2010]

Cf. A000469 (nonprime squarefree numbers), A005117 (squarefree numbers), A120944 (composite squarefree numbers), A167707 (non-single or nonisolated numbers).

Sequence in context: A140607 A286607 A204827 * A071561 A241561 A241008

Adjacent sequences: A168249 A168250 A168251 * A168253 A168254 A168255

nonn

Juri-Stepan Gerasimov, Nov 21 2009

Edited by N. J. A. Sloane, Jan 23 2010

Corrected (114 inserted) by R. J. Mathar, Apr 24 2010

approved