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A064392
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Numbers in A064383 that are squarefree.
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0
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1, 2, 5, 10, 13, 26, 37, 65, 74, 130, 185, 370, 463, 481, 926, 962, 2315, 2405, 4630, 4810, 6019, 12038, 17131, 30095, 34262, 60190, 85655, 171310, 222703
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OFFSET
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1,2
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LINKS
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Table of n, a(n) for n=1..29.
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PROG
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(PARI) for(n=1, 10^6, x=sum(k=0, n, (-1)^k*k!); if(Mod(x, n)==0 && issquarefree(n), print(n)))
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CROSSREFS
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Sequence in context: A051952 A103188 A185647 * A018296 A033316 A099194
Adjacent sequences: A064389 A064390 A064391 * A064393 A064394 A064395
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KEYWORD
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more,nonn
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AUTHOR
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Jason Earls (zevi_35711(AT)yahoo.com), Sep 28 2001
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EXTENSIONS
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a(17)-a(29) from Donovan Johnson, Nov 30 2008
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STATUS
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approved
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