A177676 Number of permutations of 4 copies of 1..n avoiding adjacent step pattern up, up, up, up, up, up.

1, 1, 70, 34650, 63063000, 305540235000, 3246670537110000, 66471564122981413201, 2389990877540259562671201, 140752914446323991227575378870, 12859891096524517937525915077936650, 1745170838822213670914740929271388502150, 339448526227710036385042441267361806617147750

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: A177671 A177656 A177657 * A014608 A185401 A172555

Adjacent sequences: A177673 A177674 A177675 * A177677 A177678 A177679

Keyword

nonn

Author

R. H. Hardin, May 10 2010

Extensions

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

Status

approved