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%I #5 Sep 17 2019 11:53:29
%S 3,5,11,17,71,107,191,431,1151,2591,139967,472391,786431,995327,
%T 57395627,63700991,169869311,4076863487,10871635967,2348273369087,
%U 56358560858111,79164837199871,84537841287167,150289495621631
%N Lesser member p of a twin prime pair such that p+1 is 3-smooth.
%C a(n) = A027856(n)-1 = A078884(n)-2.
%H Ray Chandler, <a href="/A078883/b078883.txt">Table of n, a(n) for n = 1..62</a> (terms < 10^1000)
%e A000040(20)=71 and 71+1=72=2^3*3^2=A003586(17) and 71+2=73=A000040(21), therefore 71 is a term.
%Y Cf. A001359, A014574, A003586.
%Y Apart from initial terms, same as A059960.
%K nonn
%O 1,1
%A _Reinhard Zumkeller_, Dec 11 2002
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