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 A030496 #9 Sep 24 2013 11:30:15
%S A030496 1,2,1,1,2,3,2,1,3,1,2,2,3,1,2,1,3,1,3,2,1,2,3,4,3,2,1,4,3,1,2,4,2,3,
%T A030496 1,4,2,1,3,4,1,3,2,4,1,2,3,3,4,2,1,3,4,1,2,3,2,4,1,3,2,1,4,3,1,4,2,3,
%U A030496 1,2,4,2,4,3,1,2,4,1,3,2,3,4,1,2,3,1,4,2,1,4
%N A030496 Permutations of 1,2,...,n for n=1,2,3,..., arranged antilexicographically.
%H A030496 Kerry Mitchell, <a href="/A030496/b030496.txt">Rows n = 1..7 of irregular triangle, flattened</a>
%F A030496 a(n)=m+1-s(n) where m=MAX{a(k): k<=n} and s=A030298.
%Y A030496 Cf. A030298.
%K A030496 nonn,tabf
%O A030496 1,2
%A A030496 _Clark Kimberling_