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 A202220 #6 Mar 30 2012 17:30:01 %S A202220 1,2,6,24,119,708,4914,38979,347815,3448442,37608834,447450930, %T A202220 5767170785,80050654711,1190502148797,18885313699983,318307710883720, %U A202220 5680593325882836,107009253612595865,2121902210596869336,44179286193550935095,963641311893918317652 %N A202220 Number of permutations avoiding the consecutive pattern 53241. %C A202220 a(n) is the number of permutations on [n] that avoid the consecutive pattern 53241. It is the same as the number of permutations which avoid 13425, 14235 or 53241. %H A202220 Ray Chandler, <a href="/A202220/b202220.txt">Table of n, a(n) for n = 1..40</a> %H A202220 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 A202220 Cf. A177523, A202213-A202236. %K A202220 nonn %O A202220 1,2 %A A202220 _Ray Chandler_, Dec 15 2011