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 A197158 #13 Nov 22 2024 09:06:23 %S A197158 2,5,16,57,212,817,3232,13018,53176,219680,915928,3848079,16271384, %T A197158 69183099,295561620,1267964967,5459626526 %N A197158 Number of fixed poly-[3^3.4^2]-tiles (polyhouses) (holes allowed) with n cells. %D A197158 Branko Grünbaum and G. C. Shephard, Tilings and Patterns. W. H. Freeman, New York, 1987, Sections 2.7, 6.2 and 9.4. %H A197158 Brendan Owen, <a href="http://web.archive.org/web/20061229103147/http://members.optusnet.com.au/polyforms/2dforms/polyhouses/index.htm">Polyhouses</a>. %Y A197158 Cf. A197156, A197157. %K A197158 nonn,hard,more %O A197158 1,1 %A A197158 _Joseph Myers_, Oct 10 2011 %E A197158 a(16)-a(17) from _Johann Peters_, Nov 22 2024