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<blockquote class="gmail_quote" style="PADDING-LEFT: 1ex; MARGIN: 0px 0px 0px 0.8ex; BORDER-LEFT: #ccc 1px solid">Also, is there any special name of numbers with<br>all  prime-factorization exponents >1 ?</blockquote>

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<div>Such numbers are called "powerful":</div>
<div><a href="http://www.research.att.com/~njas/sequences/A001694">http://www.research.att.com/~njas/sequences/A001694</a></div>
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<div>Gabe</div><br> </div>