A177320 - OEIS

The OEIS is supported by the many generous donors to the OEIS Foundation.

Year-end appeal: Please make a donation to the OEIS Foundation to support ongoing development and maintenance of the OEIS. We are now in our 61st year, we have over 378,000 sequences, and we’ve reached 11,000 citations (which often say “discovered thanks to the OEIS”).

Other ways to Give

A177320

Number of permutations of n copies of 1..8 with all adjacent differences <= 1 in absolute value.

1, 2, 250, 168284, 175280570, 226901044252, 336181036999948, 546641872918476120, 951645881858020642746, 1745708356607370063330620, 3337797628633312532069739500, 6600171805939224952685745226312, 13419910030462066174528563412581260, 27933944205209773363718168619462715544

(list; graph; refs; listen; history; text; internal format)

OFFSET

0,2

LINKS

Andrew Howroyd, Table of n, a(n) for n = 0..100

CROSSREFS

Row n=8 of A331562.

Sequence in context: A012527 A109118 A034313 * A304211 A224828 A370367

Adjacent sequences: A177317 A177318 A177319 * A177321 A177322 A177323

KEYWORD

nonn

AUTHOR

R. H. Hardin, May 06 2010

EXTENSIONS

a(0)=1 prepended by Alois P. Heinz, Jan 20 2020

Terms a(7) and beyond from Andrew Howroyd, May 15 2020

STATUS

approved