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 A323124 #4 Jan 05 2019 10:15:29 %S A323124 0,0,2,3,12,23,61,135,306,679,1496,3245,7013,15045,32108,68201,144297, %T A323124 304227,639461,1340353,2802566,5846953,12173864,25300472,52492698, %U A323124 108742226,224946169,464714125,958872587,1976242406,4068708686,8368344952,17195541858 %N A323124 Number of compositions of n where the difference between largest and smallest parts equals seven. %H A323124 Alois P. Heinz, <a href="/A323124/b323124.txt">Table of n, a(n) for n = 7..3332</a> %Y A323124 Column k=7 of A214258. %K A323124 nonn %O A323124 7,3 %A A323124 _Alois P. Heinz_, Jan 05 2019