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 A202230 #6 Mar 30 2012 17:30:04 %S A202230 1,2,6,24,119,708,4914,38982,347873,3449332,37621965,447648482, %T A202230 5770250935,80100822074,1191358479790,18900647287550,318595643201902, %U A202230 5686258136269396,107125880782919395,2124411456922993308,44235624533456911964,964959480961869203870 %N A202230 Number of permutations avoiding the consecutive pattern 42531. %C A202230 a(n) is the number of permutations on [n] that avoid the consecutive pattern 42531. It is the same as the number of permutations which avoid 13524, 24135 or 53142. %H A202230 Ray Chandler, <a href="/A202230/b202230.txt">Table of n, a(n) for n = 1..40</a> %H A202230 A. Baxter, B. Nakamura, and D. Zeilberger. <a href="http://www.math.rutgers.edu/~zeilberg/mamarim/mamarimhtml/auto.html">Automatic generation of theorems and proofs on enumerating consecutive Wilf-classes</a> %Y A202230 Cf. A177523, A202213-A202236. %K A202230 nonn %O A202230 1,2 %A A202230 _Ray Chandler_, Dec 15 2011