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 A123762 #33 Jan 14 2017 13:18:22 %S A123762 1,4,37,375,4493,56848,753536,10283622,143607345,2041497919, %T A123762 29446248496,429858432108 %N A123762 Number of ways, counted up to symmetry, to build a contiguous building with n LEGO blocks of size 1 X 2. %H A123762 M. Abrahamsen and S. Eilers, <a href="http://dx.doi.org/10.1080/10586458.2011.564539">On the asymptotic enumeration of LEGO structures</a>, Exper Math. 20 (2) (2011) 145-152. %H A123762 B. Durhuus and S. Eilers, <a href="http://arxiv.org/abs/math/0504039">On the entropy of LEGO</a>, arXiv:math/0504039 [math.CO], 2005. %H A123762 B. Durhuus and S. Eilers, <a href="http://link.springer.com/article/10.1007/s12190-013-0730-9">On the entropy of LEGO</a>, J. Appl. Math. Comput. 45 (1-2) (2014), 433-448. %H A123762 S. Eilers, <a href="http://www.math.ku.dk/~eilers/lego.html">A LEGO Counting problem</a>, 2005. %H A123762 S. Eilers, <a href="http://www.jstor.org/stable/10.4169/amer.math.monthly.123.5.415">The LEGO counting problem</a>, Amer. Math. Monthly, 123 (May 2016), 415-426. %H A123762 <a href="/wiki/Index_to_OEIS:_Section_Lc#LEGO">Index entry for sequences related to LEGO blocks</a> %Y A123762 Cf. A007576, A082679, A112389, A112390. %K A123762 nonn,hard,more %O A123762 1,2 %A A123762 _Søren Eilers_, Oct 29 2006