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 A089555 #5 Jan 25 2020 12:37:56 %S A089555 2,3,1,4,1,2,5,6,2,1,7,7,2,3,8,1,8,9,3,2,9,1,10,10,4,2,11,11,1,11,12, %T A089555 3,4,12,2,1,12,13,13,13,4,3,5,2,14,13,1,14,4,5,15,14,2,1,16,16,5,16,4, %U A089555 15,6,3,16,2,17,17,17,16,1,17,6,4,18,7,3,18,2,17,19,19,5,1,4,7,19,19,18,19 %N A089555 a(n)=A088516(n)/2. %H A089555 Ray Chandler, <a href="/A089555/b089555.txt">Table of n, a(n) for n = 1..10000</a> %Y A089555 Cf. A088319, A088515, A088516, A088546, A089545-A089552, A089554-A089558. %K A089555 nonn %O A089555 1,1 %A A089555 _Ray Chandler_, Nov 16 2003