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A177280 Number of permutations of 1..n with all adjacent differences <= 8 in absolute value. 0
1, 2, 6, 24, 120, 720, 5040, 40320, 362880, 2903040, 20966400, 139577760, 876615840, 5310073200, 31605605712, 187515117348, 1120681770068, 6797256099562, 41549526380408 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,2

COMMENTS

a(n)=n! for n<=9

LINKS

Table of n, a(n) for n=1..19.

CROSSREFS

Sequence in context: A131451 A084012 A062919 * A173849 A154657 A179361

Adjacent sequences:  A177277 A177278 A177279 * A177281 A177282 A177283

KEYWORD

nonn

AUTHOR

R. H. Hardin May 06 2010

STATUS

approved

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Last modified April 19 17:28 EDT 2014. Contains 240767 sequences.