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A202218 Number of permutations avoiding the consecutive pattern 32451. 1

%I #6 Mar 30 2012 17:30:01

%S 1,2,6,24,119,708,4914,38977,347793,3448182,37605545,447406214,

%T 5766525727,80040747361,1190340631290,18882526564227,318256944873984,

%U 5679619717431613,106989639176572571,2121488012937187849,44170136425049025574,963430265253564585315

%N Number of permutations avoiding the consecutive pattern 32451.

%C 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 Ray Chandler, <a href="/A202218/b202218.txt">Table of n, a(n) for n = 1..40</a>

%H 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 Cf. A177523, A202213-A202236.

%K nonn

%O 1,2

%A _Ray Chandler_, Dec 15 2011

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Last modified May 31 05:54 EDT 2024. Contains 372980 sequences. (Running on oeis4.)