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A073249 Nonprime squarefree numbers n such that n-1 and n+1 are neither squarefree nor prime. +0
4
1, 6, 10, 26, 30, 42, 46, 51, 55, 62, 74, 82, 91, 102, 138, 161, 170, 174, 190, 226, 235, 249, 262, 278, 282, 295, 305, 314, 339, 341, 362, 374, 377, 413, 415, 422, 442, 451, 458, 462, 478, 485, 489, 530, 551, 559, 570, 579, 586, 595, 602, 606, 618, 629, 638 (list; graph; listen)
OFFSET

1,2

CROSSREFS

Cf. A000469, A005117, A073247, A073250, A073251.

Sequence in context: A074289 A109099 A109095 this_sequence A077621 A081394 A014494

Adjacent sequences: A073246 A073247 A073248 this_sequence A073250 A073251 A073252

KEYWORD

nonn

AUTHOR

Reinhard Zumkeller (reinhard.zumkeller(AT)lhsystems.com), Jul 22 2002

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Last modified August 19 23:53 EDT 2008. Contains 142930 sequences.


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