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 A202214 #6 Mar 30 2012 17:30:01 %S A202214 1,2,6,24,119,708,4914,38977,347779,3447902,37600925,447332398, %T A202214 5765327905,80020698913,1189991560707,18876181370841,318136382176708, %U A202214 5677225148401090,106939954137362482,2120412050923152077,44145844897844974946,962859209130749461268 %N A202214 Number of permutations avoiding the consecutive pattern 53421. %C A202214 a(n) is the number of permutations on [n] that avoid the consecutive pattern 53421. It is the same as the number of permutations which avoid 12435, 13245 or 54231. %H A202214 Ray Chandler, <a href="/A202214/b202214.txt">Table of n, a(n) for n = 1..40</a> %H A202214 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 A202214 Cf. A177523, A202213-A202236. %K A202214 nonn %O A202214 1,2 %A A202214 _Ray Chandler_, Dec 14 2011