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 A364263 #42 Jun 28 2024 22:24:54 %S A364263 521457,7235406,107647749,123718516,161881498,200141522,215640361, %T A364263 269177896,301917955,352021648,393455227,580398355,716403116, %U A364263 916268861,1000979331,1231997208,1289093896,1354550305,1471667483,1478187348,1485031638,1520586133 %N A364263 Numbers j such that k=210*j, 2*k, k^2+k, k^2-k all are averages of twin primes. %C A364263 A derivative sequence stemming from editorial discussion with _Hugo Pfoertner_, consisting of GCD-reduced elements of A363500, all of which were determined to be multiples of 210 aside from the first term. %H A364263 Jason Yuen, <a href="/A364263/b364263.txt">Table of n, a(n) for n = 1..9999</a> (first 48 terms from Bryce Case, Jr.) %H A364263 Bryce Case, Jr., <a href="/A364263/a364263.txt">a364263.go</a> %F A364263 a(n) = A363500(n+1)/210. - _Jason Yuen_, Jun 04 2024 %o A364263 (Go) // See link. %Y A364263 Cf. A363500. %K A364263 nonn %O A364263 1,1 %A A364263 _Bryce Case, Jr._ and _Antonio Gimenez_, Jul 16 2023