A177646 Number of permutations of 4 copies of 1..n avoiding adjacent step pattern up, up, up, up.

1, 1, 70, 34650, 63063000, 302857024681, 3171644273043481, 63767771149790231020, 2246276459710030995597000, 129398739548198780715411006000, 11551019408580550906836084615390361, 1530266028377887010801240993038984544961, 290384391726747532382877490399579938116889720

Offset

0,3

Links

Table of n, a(n) for n=0..12.

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

Crossrefs

Cf. A014608.

Sequence in context: A177675 A177300 A266741 * A177647 A177658 A177670

Adjacent sequences: A177643 A177644 A177645 * A177647 A177648 A177649

Keyword

nonn

Author

R. H. Hardin, May 10 2010

Extensions

a(8) from Alois P. Heinz, Nov 01 2013

a(9)-a(12) from Alois P. Heinz, Aug 08 2018

Status

approved