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 A256597 #17 Apr 08 2015 12:28:22 %S A256597 1,11,76,436,2441 %N A256597 a(n) is the total number of pentagrams in a variant of pentagram fractal after n iterations. %C A256597 Inspired by A255870. But the scale factor is tan(Pi/10) instead of 1/phi. %C A256597 See illustration in the links. %H A256597 Kival Ngaokrajang, <a href="/A256597/a256597.pdf">Illustration of initial terms</a> %Y A256597 Cf. A255870, A256429, A256569, A256571, A256582, A256583. %K A256597 nonn,more %O A256597 1,2 %A A256597 _Kival Ngaokrajang_, Apr 04 2015