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 A265998 #14 Dec 24 2015 02:48:35 %S A265998 1,5,22,122,790 %N A265998 a(n) is the total number of occurrences of the 5-petal flower of life in the Christmas tree pattern at the n-th iteration of pattern construction (see comment). %C A265998 Inspired by A264788 but uses 5 circles instead of 6 circles. %C A265998 See construction rules and illustration in the links. %H A265998 Kival Ngaokrajang, <a href="/A265998/a265998_3.pdf">Illustration of initial terms</a>, <a href="/A265998/a265998_4.pdf">Construction rule</a>, <a href="/A265998/a265998_5.pdf">Pattern, n = 5</a> %Y A265998 Cf. A264788. %K A265998 nonn,more %O A265998 1,2 %A A265998 _Kival Ngaokrajang_, Dec 19 2015