A168252 Numbers n such that n is squarefree and n is non-single or nonisolated.

1, 3, 5, 7, 10, 11, 13, 14, 15, 17, 19, 21, 22, 26, 29, 31, 33, 34, 35, 38, 39, 41, 43, 46, 51, 55, 57, 58, 59, 61, 62, 65, 66, 69, 70, 71, 73, 74, 77, 78, 82, 85, 86, 87, 91, 93, 94, 95, 101, 103, 105, 106, 107, 109, 110, 111, 114, 115, 118, 119, 122, 123, 129, 130, 133

Offset

1,2

Links

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

Formula

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

Crossrefs

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

Sequence in context: A286607 A204827 A366882 * A071561 A241561 A241008

Adjacent sequences: A168249 A168250 A168251 * A168253 A168254 A168255

Keyword

nonn

Author

Juri-Stepan Gerasimov, Nov 21 2009

Extensions

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

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

Status

approved