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A118669 Numbers that are not square-free, but contain their square-free kernel in decimal representation. +0
1
25, 32, 36, 96, 100, 125, 128, 162, 216, 243, 256, 300, 486, 512, 576, 625, 648, 700, 768, 864, 1000, 1024, 1100, 1215, 1296, 1300, 1536, 1700, 1900, 2048, 2100, 2300, 2430, 2900, 2916, 3000, 3100, 3125, 3300, 3456, 3700, 3773, 3900, 4100, 4300, 4608 (list; graph; listen)
OFFSET

1,1

COMMENT

For k>1: m*10^k are terms for square-free numbers m coprime to 10;

if m is a term and coprime to 10 then also 10*m is a term.

LINKS

Eric Weisstein's World of Mathematics, Squarefree

CROSSREFS

Cf. A005117, A013929, A007947, A076333.

Sequence in context: A039323 A043146 A043926 this_sequence A092100 A107258 A035140

Adjacent sequences: A118666 A118667 A118668 this_sequence A118670 A118671 A118672

KEYWORD

nonn,base

AUTHOR

Reinhard Zumkeller (reinhard.zumkeller(AT)gmail.com), May 19 2006

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Last modified November 18 20:14 EST 2008. Contains 147244 sequences.


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