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 A103466 #15 Sep 21 2022 01:45:21 %S A103466 1,1,3,11,50,269,1605,10102,65323,430302,2868320,19299334,130807068, %T A103466 892075515,6115673262 %N A103466 Number of polyominoes consisting of n regular unit octagons. %H A103466 Matthias Koch and Sascha Kurz, <a href="https://arxiv.org/abs/math/0605144">Enumeration of generalized polyominoes</a>, arXiv:math/0605144 [math.CO], 2006. %H A103466 S. Kurz, <a href="http://www.mathe2.uni-bayreuth.de/sascha/oeis/k-polyominoes.html">k-polyominoes</a>. %Y A103466 Cf. A000577, A000104, A000228, A103465, A103465, A103467, A103468. %Y A103466 Cf. A000577, A000104, A000228, A103465, A103467, A103468, A103469, A103470, A103471, A103472, A103473, A115071, A120102, A120103, A120104. %K A103466 more,nonn %O A103466 1,3 %A A103466 _Sascha Kurz_, Feb 07 2005 %E A103466 More terms from _Sascha Kurz_, Jun 09 2006 %E A103466 Definition corrected by _John Mason_ and _Sascha Kurz_, Sep 20 2020