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A086852 Number of permutations of length n with exactly 1 rising or falling succession. +0
10
0, 0, 2, 4, 10, 40, 230, 1580, 12434, 110320, 1090270, 11876980, 141373610, 1825321016, 25405388150, 379158271420, 6039817462210, 102278890975360, 1834691141852174, 34752142215026180, 693126840194499290, 14519428780464454600, 318705819455462421670 (list; graph; listen)
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Last modified December 15 00:47 EST 2009. Contains 170825 sequences.


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