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A079104
Number of permutations of length n containing the minimum number of monotone subsequences of length 4.
4
1, 2, 6, 22, 86, 306, 882, 1764, 1764, 8738, 6892, 1682, 14706, 4182, 1250, 6250, 3750, 1250
OFFSET
1,2
COMMENTS
Conjectured to equal A079105 (and so have period 3) from a(17) onwards.
LINKS
Joseph Myers, The minimum number of monotone subsequences, Electronic J. Combin. 9(2) (2002), #R4.
CROSSREFS
KEYWORD
nonn
AUTHOR
Joseph Myers, Dec 23 2002
STATUS
approved