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A077682
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Squarefree numbers beginning with 6.
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12
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6, 61, 62, 65, 66, 67, 69, 601, 602, 606, 607, 609, 610, 611, 613, 614, 615, 617, 618, 619, 622, 623, 626, 627, 629, 631, 633, 634, 635, 638, 641, 642, 643, 645, 646, 647, 649, 651, 653, 654, 655, 658, 659, 661, 662, 663, 665, 667, 669, 670, 671, 673, 674
(list;
graph;
refs;
listen;
history;
text;
internal format)
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OFFSET
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1,1
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COMMENTS
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LINKS
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MAPLE
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with(numtheory): select(issqrfree, [seq(seq(6*10^n+k, k=0..10^n-1), n=0..3)]); # Muniru A Asiru, Nov 22 2018
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MATHEMATICA
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Select[Range[1000], SquareFreeQ[#]&&First[IntegerDigits[#]]==6&] Harvey P. Dale, May 19 2012
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PROG
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CROSSREFS
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KEYWORD
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base,easy,nonn
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AUTHOR
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EXTENSIONS
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STATUS
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approved
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