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 A197160 #14 Dec 17 2024 15:33:08 %S A197160 6,15,44,141,480,1703,6216,23136,87334,333309,1283706,4982458, %T A197160 19466130,76479612,301923554,1196919714,4762524162,19012433694 %N A197160 Number of fixed poly-[3^4.6]-tiles (holes allowed) with n cells. %D A197160 Branko Grünbaum and G. C. Shephard, Tilings and Patterns. W. H. Freeman, New York, 1987, Sections 2.7, 6.2 and 9.4. %Y A197160 Cf. A197159. %K A197160 hard,nonn %O A197160 1,1 %A A197160 _Joseph Myers_, Oct 10 2011 %E A197160 a(16)-a(18) from _Johann Peters_, Dec 17 2024