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%I #7 Aug 25 2014 12:19:04
%S 4,6,9,8,12,18,10,15,22,32,14,25,16,28,42,20,33,48,21,38,54,24,44,63,
%T 26,49,70,27,51,76,30,56,84,34,65,36,68,35,69,104,39,75,114,40,78,118,
%U 45,86,128,46,90,135,50,98,145,52,105,154,55,106,158,57,111,166,58,115
%N a(1) = 1; a(n+1) is the least composite number m not already used such that |m-a(n)| is not equal to |a(k+1)-a(k)| for any k < n.
%Y Cf. A081145, A084331, A084334.
%K nonn,easy
%O 1,1
%A _Amarnath Murthy_ and Meenakshi Srikanth (menakan_s(AT)yahoo.com), Jun 18 2003
%E Edited and extended by _David Wasserman_, Dec 15 2004
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