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 A202215 #6 Mar 30 2012 17:30:01 %S A202215 1,2,6,24,119,708,4914,38977,347783,3447982,37602245,447353497, %T A202215 5765670515,80026435959,1190091483826,18877998176267,318170909582504, %U A202215 5677911026433716,106954187252974515,2120720309936327198,44152804913927293967,963022839743497051427 %N A202215 Number of permutations avoiding the consecutive pattern 43251. %C A202215 a(n) is the number of permutations on [n] that avoid the consecutive pattern 43251. It is the same as the number of permutations which avoid 15234, 23415 or 51432. %H A202215 Ray Chandler, <a href="/A202215/b202215.txt">Table of n, a(n) for n = 1..40</a> %H A202215 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 A202215 Cf. A177523, A202213-A202236. %K A202215 nonn %O A202215 1,2 %A A202215 _Ray Chandler_, Dec 14 2011