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%I #4 Dec 05 2013 19:55:19
%S 3,6,0,10,15,14,21,18,35,22,33,26,39,0,65,30,36,38,57,44,95,46,63,42,
%T 115,50,64,58,87,54,75,68,155,60,99,74,111,72,185,66,117,86,129,92,
%U 215,94,141,78,235,84,105,98,100,96,265,90,135,118,147,122,183,108
%N Smallest number with n unrelated numbers (numbers which are neither coprime nor a divisor), or 0 if no such number exists.
%C The 0's are only conjectures (search extended to 2000).
%e a(0) = 4, as 4 has no unrelated numbers less than it. a(5) = 14. The unrelated numbers pertaining to 14 are 4,6,8 10 and 12.
%o (PARI) for(n=0,100,s=-1:k=2:while(s!=n&&k<2000,k=k+1:s=0:for(l=2,k-1,if((k%l>0)&&gcd(k,l)>1,s=s+1))): if(k==2000,k=0):print1(k","))
%Y Cf. A070298.
%K nonn
%O 0,1
%A _Amarnath Murthy_, May 10 2002
%E Corrected and extended by _Ralf Stephan_, Mar 22 2003
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