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 A330421 #10 Dec 16 2019 02:19:36 %S A330421 0,2,3,7,2,5,11,3,13,2,11,23,37,53,71,47,67,89,61,31,5,37,3,41,5,47,7, %T A330421 53,97,47,2,17,71,23,2,19,71,127,67,5,71,13,83,19,97,29,2,31,103,29, %U A330421 109,191,107,31,127,41,2,37,127,29,131,43,2,53,157,251,151 %N A330421 Running totals in A330402. %C A330421 All terms, except the first, are prime numbers. %H A330421 Rémy Sigrist, <a href="/A330421/b330421.txt">Table of n, a(n) for n = 0..10000</a> %H A330421 Rémy Sigrist, <a href="/A330421/a330421.gp.txt">PARI program for A330421</a> %F A330421 A330402(n) = abs(a(n) - a(n-1)). %o A330421 (PARI) See Links section. %Y A330421 Cf. A330402. %K A330421 nonn %O A330421 0,2 %A A330421 _Rémy Sigrist_, Dec 14 2019