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 A294001 #4 Oct 21 2017 20:04:04 %S A294001 1,1,3,15,105,945,10395,135135,2027025,34459425,218243025,1512548793, %T A294001 11451456921,94099903993,832822929881,7850100744697,77247769844585, %U A294001 766602148661941,7301487795390325,63860693057569633,549669975975395633,4765146317902742829 %N A294001 Number of linear chord diagrams having n chords and no chord length larger than nine. %H A294001 Alois P. Heinz, <a href="/A294001/b294001.txt">Table of n, a(n) for n = 0..1000</a> %Y A294001 Column k=9 of A293960. %K A294001 nonn,easy %O A294001 0,3 %A A294001 _Alois P. Heinz_, Oct 21 2017