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 A202218 #6 Mar 30 2012 17:30:01 %S A202218 1,2,6,24,119,708,4914,38977,347793,3448182,37605545,447406214, %T A202218 5766525727,80040747361,1190340631290,18882526564227,318256944873984, %U A202218 5679619717431613,106989639176572571,2121488012937187849,44170136425049025574,963430265253564585315 %N A202218 Number of permutations avoiding the consecutive pattern 32451. %C A202218 a(n) is the number of permutations on [n] that avoid the consecutive pattern 32451. It is the same as the number of permutations which avoid 15423, 34215 or 51243. %H A202218 Ray Chandler, <a href="/A202218/b202218.txt">Table of n, a(n) for n = 1..40</a> %H A202218 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 A202218 Cf. A177523, A202213-A202236. %K A202218 nonn %O A202218 1,2 %A A202218 _Ray Chandler_, Dec 15 2011