%I A064392
%S A064392 1,2,5,10,13,26,37,65,74,130,185,370,463,481,926,962,2315,2405,4630,
%T A064392 4810,6019,12038,17131,30095,34262,60190,85655,171310,222703
%N A064392 Numbers in A064383 that are squarefree.
%o A064392 (PARI) for(n=1,10^6,x=sum(k=0,n,(-1)^k*k!); if(Mod(x,n)==0 && issquarefree(n),
               print(n)))
%Y A064392 Sequence in context: A064233 A051952 A103188 this_sequence A018296 A033316 
               A099194
%Y A064392 Adjacent sequences: A064389 A064390 A064391 this_sequence A064393 A064394 
               A064395
%K A064392 more,nonn
%O A064392 1,2
%A A064392 Jason Earls (zevi_35711(AT)yahoo.com), Sep 28 2001
%E A064392 a(17)-a(29) from Donovan Johnson (donovan.johnson(AT)yahoo.com), Nov 
               30 2008