A177640 Number of permutations of 4 copies of 1..n avoiding adjacent step pattern up, up, up.

1, 1, 70, 34650, 58370761, 254257625001, 2393820329913000, 43063879074705797700, 1353425989195928500100361, 69430476979743039562119157801, 5512282735792717664890405885818130, 648886597453482823172404492855676280150, 109337364789335440628249746207373482901394961

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

Sequence in context: A177672 A177299 A266740 * A177641 A177648 A177653

Adjacent sequences: A177637 A177638 A177639 * A177641 A177642 A177643

Keyword

nonn

Author

R. H. Hardin, May 10 2010

Extensions

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

a(0), a(9)-a(12) from Alois P. Heinz, Aug 08 2018

Status

approved