Number of permutations of an n-sequence discordant with three given permutations (see reference) in n-6 places.
20, 154, 1676, 14292, 155690, 1731708, 21264624, 280260864, 3970116255
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Fri Oct 29 05:35:16 CEST 2010 [seqfan] Implementing first 500 sequences in Java