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 A058180 #5 Dec 21 2024 22:29:17 %S A058180 206,230,250,260,602,640,5000,8000,9000,26000,80000,90000 %N A058180 Numbers whose English names include all five vowels exactly once. %D A058180 GCHQ, The GCHQ Puzzle Book II, Penguin, 2018. See question 189(b). %e A058180 206 = two hundred and six 80000 = eighty thousand %Y A058180 Cf. A058179. %K A058180 easy,fini,full,nonn,word %O A058180 1,1 %A A058180 _Stewart Gordon_, Nov 14 2000