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A073247 Squarefree numbers n such that n-1 and n+1 are not squarefree. 2
17, 19, 26, 51, 53, 55, 89, 91, 97, 127, 149, 151, 161, 163, 170, 197, 199, 233, 235, 241, 249, 251, 269, 271, 293, 295, 305, 307, 337, 339, 341, 349, 362, 377, 379, 413, 415, 449, 451, 485, 487, 489, 491, 521, 523, 530, 551, 557, 559, 577, 579, 593, 595 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

LINKS

Table of n, a(n) for n=1..53.

CROSSREFS

Cf. A005117, A073249, A073248, A007675.

Sequence in context: A038711 A154881 A205646 * A133347 A096990 A175384

Adjacent sequences:  A073244 A073245 A073246 * A073248 A073249 A073250

KEYWORD

nonn

AUTHOR

Reinhard Zumkeller, Jul 22 2002

STATUS

approved

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Last modified May 22 09:43 EDT 2013. Contains 225519 sequences.