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 A280517 #21 Mar 08 2025 09:35:01 %S A280517 1,2,14,263,13462,2104021,1366427911,6266456586228 %N A280517 Number of sequences of n positive integers with reciprocals adding up to an integer. %H A280517 Kassie Archer, Abigail Bishop, Alexander Diaz-Lopez, Luis David Garcia Puente, Darren Glass, Joel Louwsma, <a href="https://arxiv.org/abs/1903.01393">Arithmetical structures on bidents</a>, arXiv:1903.01393 [math.CO], 2019. %H A280517 Dilli Ram Chhetri, Namita Behera, Raj Bhawan Yadav, <a href="https://arxiv.org/abs/2503.01913">Arithmetical Structures On Fan Graphs</a>, arXiv:2503.01913 [math.CO], 2025. See p. 17. %Y A280517 Row sums of A280519. %Y A280517 Cf. A002967 (adding up to 1), A156871 (nondecreasing sequences), A280518 (increasing sequences). %K A280517 nonn,hard,more %O A280517 1,2 %A A280517 _Max Alekseyev_, Jan 04 2017