A177599 Number of permutations of 3 copies of 1..n avoiding adjacent step pattern up, up, up.

1, 1, 20, 1680, 347279, 145417911, 108103451700, 130235191847880, 237916352264650149, 626620767478218488341, 2286998940761680215812180, 11203494211631147331264432480, 71758642346800717617629677669619, 587889139521679290927189491977855371

Offset: 0

Author

R. H. Hardin, May 10 2010

Keywords

• nonn

Links

• Mingjia Yang and Doron Zeilberger, Increasing Consecutive Patterns in Words, arXiv:1805.06077 [math.CO], 2018.
• Mingjia Yang, An experimental walk in patterns, partitions, and words, Ph. D. Dissertation, Rutgers University (2020).

Crossrefs

Cf. A014606.

Extensions

a(10) from Alois P. Heinz, Nov 01 2013

a(11)-a(13) from Alois P. Heinz, Aug 08 2018