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A086853 Number of permutations of length n with exactly 2 rising or falling successions. +0
8
0, 0, 0, 2, 10, 48, 256, 1670, 12846, 112820, 1108612, 12032154, 142852450, 1840969784, 25587270600, 381460235918, 6071318154166, 102742200205980, 1841978156709676, 34874169034136930, 695294184953602602, 14560120360421802464, 319510983674891800240 (list; graph; listen)
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Last modified December 8 08:31 EST 2009. Contains 170430 sequences.


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