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A064392 Numbers in A064383 that are squarefree. 0
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 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,2

LINKS

Table of n, a(n) for n=1..29.

PROG

(PARI) for(n=1, 10^6, x=sum(k=0, n, (-1)^k*k!); if(Mod(x, n)==0 && issquarefree(n), print(n)))

CROSSREFS

Sequence in context: A103188 A281229 A185647 * A018296 A033316 A099194

Adjacent sequences:  A064389 A064390 A064391 * A064393 A064394 A064395

KEYWORD

more,nonn

AUTHOR

Jason Earls, Sep 28 2001

EXTENSIONS

a(17)-a(29) from Donovan Johnson, Nov 30 2008

STATUS

approved

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Last modified November 21 09:32 EST 2018. Contains 317446 sequences. (Running on oeis4.)