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 A323126 #4 Jan 05 2019 13:33:49 %S A323126 0,0,2,3,12,23,61,135,306,679,1499,3257,7050,15155,32403,68958,146198, %T A323126 308864,650526,1366381,2862979,5985534,12488703,26009872,54079483, %U A323126 112268717,232738777,481845900,996363218,2057944305,4246084055,8752094504,18023139943 %N A323126 Number of compositions of n where the difference between largest and smallest parts equals nine. %H A323126 Alois P. Heinz, <a href="/A323126/b323126.txt">Table of n, a(n) for n = 9..3325</a> %Y A323126 Column k=9 of A214258. %K A323126 nonn %O A323126 9,3 %A A323126 _Alois P. Heinz_, Jan 05 2019