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%I #5 Apr 03 2013 11:57:24
%S 0,0,0,0,0,2,34,382,3518,28708,216098,1536960,10488708,69393216,
%T 448301130,2842611306,17758399872,109613418746,669950441982,
%U 4061411038376,24453911859134,146393798673526,872121958672162,5173931524573894,30584965562156650
%N Number of permutations of length n containing exactly 2 occurrences of 1234 and 2 occurrences of 1243.
%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. A006318, A224292, A224293.
%K nonn
%O 1,6
%A _Brian Nakamura_, Apr 03 2013
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