Number of permutations of an n-sequence discordant with three given permutations (see reference) in n-2 places.
6, 20, 180, 1106, 9292, 82980, 831545, 9139482, 109595496, 1423490744
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Fri Oct 29 05:35:16 CEST 2010 [seqfan] Implementing first 500 sequences in Java