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 A202216 #6 Mar 30 2012 17:30:01 %S A202216 1,2,6,24,119,708,4914,38976,347775,3447912,37601586,447346944, %T A202216 5765604885,80025786960,1190085736014,18877969022976,318171464604945, %U A202216 5677939605422880,106955077375109430,2120744934976978944,44153462828412744975,963040357207773472320 %N A202216 Number of permutations avoiding the consecutive pattern 34521. %C A202216 a(n) is the number of permutations on [n] that avoid the consecutive pattern 34521. It is the same as the number of permutations which avoid 12453, 31245, 35421, 54213, 12543, 32145 or 54123. %H A202216 Ray Chandler, <a href="/A202216/b202216.txt">Table of n, a(n) for n = 1..40</a> %H A202216 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 A202216 Cf. A177523, A202213-A202236. %K A202216 nonn %O A202216 1,2 %A A202216 _Ray Chandler_, Dec 14 2011