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 A092209 #10 Feb 16 2025 08:32:52 %S A092209 4,4,91,213,213,1383,3091,8129 %N A092209 Smallest number k such that k, k+2, k+4, ..., k+2n are semiprimes. %C A092209 Semiprimes in arithmetic progression. All terms are odd, except for the first two. See also A056809. %H A092209 Eric Weisstein's World of Mathematics, <a href="https://mathworld.wolfram.com/Semiprime.html">Semiprime.</a> %Y A092209 First entry in A001358, A092207, A092125, A092126, A092127, A092128, A092129, A082919 respectively. %K A092209 nonn,fini,full %O A092209 0,1 %A A092209 _Robert G. Wilson v_ and _Zak Seidov_, Feb 24 2004