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 A007795 #19 Sep 08 2022 08:44:35 %S A007795 23,57,1113,1719,2329,3137,4143,4753,5961,6771,7379,8389,97101,103107, %T A007795 109113,127131,137139,149151,157163,167173,179181,191193,197199, %U A007795 211223,227229,233239,241251,257263,269271,277281,283293,307311,313317,331337,347349,353359 %N A007795 Juxtapose pairs of primes. %H A007795 Vincenzo Librandi, <a href="/A007795/b007795.txt">Table of n, a(n) for n = 1..1000</a> %t A007795 FromDigits[Flatten[IntegerDigits/@#]]&/@Partition[Prime[ Range[150]],2] (* _Harvey P. Dale_, May 06 2011 *) %o A007795 (Magma) [Seqint(Intseq(NthPrime(n+1)) cat Intseq(NthPrime(n))): n in [1..86 by 2]]; // _Vincenzo Librandi_, Jan 05 2018 %K A007795 nonn,base %O A007795 1,1 %A A007795 William B. Moore (bmoore(AT)artemis.ess.ucla.edu) %E A007795 More terms from _Harvey P. Dale_, May 06 2011