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%I #3 Mar 30 2012 18:50:25
%S 0,0,1,0,2,0,0,0,0,0,3,0,0,0,0,0,4,0,0,0,0,0,0,0,0,0,0,0,5,0,0,0,0,0,
%T 0,0,0,0,0,0,6,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,7,0,0,0,0,0,0,0,0,0,
%U 0,0,8,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0
%N If (n, n+2) is the k-th twin prime pair then k else 0.
%C A001359(a(n)) = n, A006512(a(n)) = n+2.
%Y Cf. A074038, A049084.
%K nonn
%O 1,5
%A _Reinhard Zumkeller_, Aug 13 2002
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