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 A280887 #4 Jan 12 2017 15:35:19 %S A280887 1,45,165,8415,1287,195195,366795,22046310,2358070,693870606,39982878, %T A280887 7765924530,19829897010,1474459789770,4013220090,63387586762335, %U A280887 769009559175,106739428871075,85029993637875,28720696235896665,574973722599705,581923529546044725 %N A280887 Number of set partitions of [n] into exactly nine blocks where sizes of distinct blocks are coprime. %H A280887 Wikipedia, <a href="https://en.wikipedia.org/wiki/Coprime_integers">Coprime integers</a> %H A280887 Wikipedia, <a href="https://en.wikipedia.org/wiki/Partition_of_a_set">Partition of a set</a> %Y A280887 Column k=9 of A280880. %K A280887 nonn %O A280887 9,2 %A A280887 _Alois P. Heinz_, Jan 09 2017