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 A280885 #4 Jan 12 2017 15:16:31 %S A280885 1,28,84,2730,462,45276,73788,2849847,365365,69293224,4913272, %T A280885 623100660,1424294340,67844069880,333126696,2369968906305,38838853515, %U A280885 4030108023172,3637504185700,767066790520030,21258921662550,13536000500234940,10485013256679780 %N A280885 Number of set partitions of [n] into exactly seven blocks where sizes of distinct blocks are coprime. %H A280885 Wikipedia, <a href="https://en.wikipedia.org/wiki/Coprime_integers">Coprime integers</a> %H A280885 Wikipedia, <a href="https://en.wikipedia.org/wiki/Partition_of_a_set">Partition of a set</a> %Y A280885 Column k=7 of A280880. %K A280885 nonn %O A280885 7,2 %A A280885 _Alois P. Heinz_, Jan 09 2017