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A064392 Numbers in A064383 that are squarefree. 0

%I

%S 1,2,5,10,13,26,37,65,74,130,185,370,463,481,926,962,2315,2405,4630,

%T 4810,6019,12038,17131,30095,34262,60190,85655,171310,222703

%N Numbers in A064383 that are squarefree.

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

%K more,nonn

%O 1,2

%A _Jason Earls_, Sep 28 2001

%E a(17)-a(29) from _Donovan Johnson_, Nov 30 2008

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Last modified September 27 22:01 EDT 2022. Contains 357063 sequences. (Running on oeis4.)