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A168252 Numbers n such that n is squarefree and n is non-single or nonisolated. 1
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 (list; graph; refs; listen; history; text; internal format)
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: A189293 A140607 A204827 * 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

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Last modified December 4 02:25 EST 2016. Contains 278745 sequences.