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 A118549 #6 Nov 07 2018 14:44:01 %S A118549 1,8,11,18,21,28,31,38,41,38,51,58,61,68,71,78,81,88,91,98,800,801, %T A118549 802,803,804,805,806,807,808,809,810,811,812,813,814,815,816,817,818, %U A118549 819,820,821,822,823,824,825,826,827,828,829,830 %N A118549 Numbers beginning with a vowel in Dutch. %e A118549 Een, acht, elf, achttien, eenentwintig, achtentwintig, eenendertig, ... %Y A118549 Cf. A000852 (English), A118557 (French), A167621 (Spanish), A291663 (Danish). %K A118549 nonn,word %O A118549 1,2 %A A118549 Luc Stevens (lms022(AT)yahoo.com), May 03 2006