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A177594 Number of permutations of 2 copies of 1..n avoiding adjacent step pattern up, up, up, up, up, up. 0
1, 1, 6, 90, 2520, 113400, 7484400, 681040081, 81715496353, 12500505087678, 2374643401938450, 548423992273068450, 151329242873227786290, 49169594830177508466780, 18581179389079670034395725, 8080585890092465008705929001, 4006831811683726939901512184106 (list; graph; refs; listen; history; text; internal format)
OFFSET

0,3

LINKS

Table of n, a(n) for n=0..16.

Mingjia Yang, Doron Zeilberger, Increasing Consecutive Patterns in Words, arXiv:1805.06077 [math.CO], 2018.

CROSSREFS

Sequence in context: A177574 A177575 A177286 * A177287 A177288 A177289

Adjacent sequences:  A177591 A177592 A177593 * A177595 A177596 A177597

KEYWORD

nonn

AUTHOR

R. H. Hardin, May 10 2010

EXTENSIONS

a(12)-a(14) from Alois P. Heinz, Nov 01 2013

a(0), a(15)-a(16) from Alois P. Heinz, Aug 08 2018

STATUS

approved

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Last modified January 17 17:12 EST 2019. Contains 319235 sequences. (Running on oeis4.)