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A159903 Concatenation of the first n non-squarefree numbers A013929. +0
1
4, 48, 489, 48912, 4891216, 489121618, 48912161820, 4891216182024, 489121618202425, 48912161820242527, 4891216182024252728, 489121618202425272832, 48912161820242527283236 (list; graph; listen)
OFFSET

1,1

EXAMPLE

a(4) = 48912 is the concatenation 4//8//9//12 of A013929(1) to A013929(4).

CROSSREFS

Cf. A013929.

Sequence in context: A111903 A059409 A026942 this_sequence A099671 A126967 A098402

Adjacent sequences: A159900 A159901 A159902 this_sequence A159904 A159905 A159906

KEYWORD

nonn,base,less

AUTHOR

Jaroslav Krizek (jaroslav.krizek(AT)atlas.cz), Apr 25 2009

EXTENSIONS

Slightly edited by R. J. Mathar (mathar(AT)strw.leidenuniv.nl), Apr 28 2009

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Last modified December 5 23:38 EST 2009. Contains 170428 sequences.


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