This is a front-end for the Online Encyclopedia of Integer Sequences, made by Christian Perfect. The idea is to provide OEIS entries in non-ancient HTML, and then to think about how they're presented visually. The source code is on GitHub.
%I A134701 #8 May 28 2025 16:36:08 %S A134701 5,5,5,5,13,283,283,1823,443119823,35332754383,57704757113, %T A134701 69478435945493,2235755385712423,5314285836920063,300677829503061013 %N A134701 Smallest initial prime, greater than 3, of a prime chain of length n under the iteration x->2x-3. %e A134701 a(3) = 5 because 5, 5*2-3=7, 7*2-3=11 and 11*2-3=19 are primes. %Y A134701 Cf. A084954. %K A134701 nonn,more %O A134701 1,1 %A A134701 _Don Reble_, Nov 07 2007 %E A134701 a(14)-a(15) from _Bert Dobbelaere_, May 28 2025