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 A304206 #14 May 14 2018 11:12:02 %S A304206 1,2,3,4,6,7,9,12,13,14,18,60 %N A304206 Numbers from the "octagonal theorem of sixty". %H A304206 Jangwon Ju, <a href="https://arxiv.org/abs/1805.03434">Universal sums of generalized pentagonal numbers</a>, arXiv:1805.03434 [math.NT], 2018 (see page 2). %H A304206 Jangwon Ju and Byeong-Kweon Oh, <a href="https://arxiv.org/abs/1704.08826">Universal sums of generalized pentagonal numbers</a>, arXiv:1704.08826 [math.NT], 2017 (see page 6, Theorem 3.1). %Y A304206 Cf. A030050, A030051, A116582, A154363, A304204. %K A304206 nonn,fini,full %O A304206 1,2 %A A304206 _Vincenzo Librandi_, May 11 2018