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%I #25 Jan 01 2020 10:28:27
%S 11,29,137,239,641,1151,1931,2339,3851,4091,5639,6359,8231,9011,9431,
%T 11351,12161,14561,15731,17837,20441,25931,26951,29207,33767,37781,
%U 40847,42407,44381,46439,59471,60917,61979,65171,67427,80831,81929
%N Lower twin primes with lower twin prime index.
%H Amiram Eldar, <a href="/A088460/b088460.txt">Table of n, a(n) for n = 1..10000</a> (terms 1..177 from Zak Seidov)
%F a(n) = A001359(A001359(n)).
%F a(n) == 5 (mod 6).
%e n=1 -> A001359(1)=3 -> A001359(3) = 11 = a(1).
%e n=2 -> A001359(2)=5 -> A001359(5) = 29 = a(2).
%e n=3 -> A001359(3)=11 -> A001359(11) = 137 = a(3).
%o (PARI) a(k) = { for(x1=1,k, print1(twinl(twinl(x1))", ") ) }
%o twinl(n) = { c=0; x=1; while(c<n, if(isprime(prime(x)+2),c++); x++; ); return(prime(x-1)) }
%Y Cf. A001359, A088463, A007097.
%K nonn
%O 1,1
%A _Cino Hilliard_, Nov 12 2003
%E Edited and corrected by _David W. Wilson_, Oct 29 2006
%E Additional comments from _R. J. Mathar_, Oct 29 2006
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