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 A174250 #7 Dec 04 2018 21:21:01 %S A174250 1,1,6,132,2369,33344,451206,5850115,81459922,1144259389,15946621499 %N A174250 Number of tilings of a 6 X n rectangle with n hexominoes of any shape. %H A174250 R. S. Harris, <a href="http://www.bumblebeagle.org/polyominoes/tilingcounting/counting_9x9_tilings.pdf">Counting Nonomino Tilings and Other Things of that Ilk</a>, G4G9 Gift Exchange book, 2010. %H A174250 R. S. Harris, <a href="http://www.bumblebeagle.org/polyominoes/tilingcounting">Counting Polyomino Tilings</a> %H A174250 Wikipedia, <a href="https://en.wikipedia.org/wiki/Hexomino">Hexomino</a> %Y A174250 Cf. A134438, A174248, A174249, A174251, A174252, A174253. %K A174250 nonn,more %O A174250 0,3 %A A174250 Bob Harris (me13013(AT)gmail.com), Mar 13 2010