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A224291 Number of permutations of length n containing exactly 4 occurrences of 123 and 4 occurrences of 132. 0

%I #5 Apr 03 2013 11:55:54

%S 0,0,0,0,1,11,60,270,1084,4028,14144,47577,154740,489728,1514786,

%T 4593118,13682374,40106060,115824376,329901232,927585696,2576685888,

%U 7076644480,19228648192,51725149184

%N Number of permutations of length n containing exactly 4 occurrences of 123 and 4 occurrences of 132.

%H B. Nakamura, <a href="http://arxiv.org/abs/1301.5080">Approaches for enumerating permutations with a prescribed number of occurrences of patterns</a>, arXiv 1301.5080, 2013.

%p # Programs can be obtained from author's personal website.

%Y Cf. A000079, A001787, A001815, A046718, A001793.

%K nonn

%O 1,6

%A _Brian Nakamura_, Apr 03 2013

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Last modified September 15 08:55 EDT 2024. Contains 375932 sequences. (Running on oeis4.)