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 A152521 #8 Aug 26 2020 03:10:07 %S A152521 23,3137,8389,157163,167173,233239,257263,331337,353359,467479,509521, %T A152521 523541,653659,661673,677683,727733,11871193,12011213,12591277, %U A152521 13671373,14531459,16691693,17091721,17411747,21792203,22072213,22812287 %N A152521 Juxtaposition of prime(2n-1) and prime(2n) is a prime. %C A152521 Primes in sequence A007795. %H A152521 N. Lygeros, <a href="https://lygeros.org/139-en/">G-test</a>. %o A152521 (PARI) forstep(n=1,1000,2,a=eval(Str(prime(n),prime(n+1)));if(isprime(a),print1(a", "))) %Y A152521 Cf. A007795. %K A152521 base,nonn %O A152521 1,1 %A A152521 Herman Jamke (hermanjamke(AT)fastmail.fm), Dec 06 2008