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 A338340 #9 Oct 28 2020 10:39:37 %S A338340 2,7,11,19,38,78,82,91,125,157,161,186,206,260,290,331,377,430,453, %T A338340 493,502,514,601,610,619,675,684,711,744,797,822,946,1039,1061,1087, %U A338340 1215,1313,1317,1494,1557,1736,1765,1930,1939,2053,2217,2231,2260,2522,2710,2719,2846,2904 %N A338340 Numbers k such that A338338(k) is a prime p that starts a run of three terms in A338338 that are divisible by p. %H A338340 Rémy Sigrist, <a href="/A338340/b338340.txt">Table of n, a(n) for n = 1..10000</a> %H A338340 Rémy Sigrist, <a href="/A338340/a338340.gp.txt">PARI program for A338340</a> %o A338340 (PARI) See Links section. %Y A338340 Cf. A338338-A338349. %K A338340 nonn %O A338340 1,1 %A A338340 _N. J. A. Sloane_, Oct 27 2020