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A176813 Numbers n such that 3*A077800(2n-1) and p+2<3*A077800(2n) where A077800 is list of twin primes {p,p+2}.

%I A176813 #9 May 15 2017 16:05:06
%S A176813 1,2,7,18,60,82,149,228,229,268,325,340,372,479,508,510,515,518,619,
%T A176813 622,710,743,790,892,910,955,998,1020,1158,1184,1215,1266,1310,1363,
%U A176813 1431,1478,1567,1885,1921,1979,2066,2316,2476,2541,2688,2704,2781,2798,2809
%N A176813 Numbers n such that 3*A077800(2n-1)<p and p+2<3*A077800(2n) where A077800 is list of twin primes {p,p+2}.
%C A176813 Indices n of lower twin primes A001359(n) such that both members of some twin prime pair (p,p+2) are inside the open interval (3*A001359(n),3*A006512(n)). [_R. J. Mathar_, May 10 2010]
%e A176813 a(1)=1 because 3*A077800(2*1-1)=9<11 and 11+2<3*A077800(2*1)=15;
%e A176813 a(2)=2 because 3*A077800(2*2-1)=15<17 and 17+2<3*A077800(2*2)=21;
%e A176813 a(3)=7 because 3*A077800(2*7-1)=177<179 and 179+2<3*A077800(2*7)=183;
%e A176813 a(4)=18 because 3*A077800(2*18-1)=807<809 and 809+2<3*A077800(2*18)=813;
%e A176813 a(5)=60 because 3*A077800(2*60-1)=5847<5849 and 5849+2<3*A077800(2*60)=5853.
%K A176813 nonn
%O A176813 1,2
%A A176813 _Juri-Stepan Gerasimov_, Apr 26 2010
%E A176813 Extended beyond 60 by _R. J. Mathar_, May 10 2010