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 A323123 #4 Jan 05 2019 09:39:46 %S A323123 0,0,2,3,12,23,61,135,306,676,1487,3217,6931,14832,31564,66844,141021, %T A323123 296460,621290,1298416,2706869,5630554,11688444,24219318,50099741, %U A323123 103475201,213410807,439563765,904260858,1858097728,3813986918,7820873757,16022252780 %N A323123 Number of compositions of n where the difference between largest and smallest parts equals six. %H A323123 Alois P. Heinz, <a href="/A323123/b323123.txt">Table of n, a(n) for n = 6..3342</a> %Y A323123 Column k=6 of A214258. %K A323123 nonn %O A323123 6,3 %A A323123 _Alois P. Heinz_, Jan 05 2019