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A177279 Number of permutations of 1..n with all adjacent differences <= 7 in absolute value. 0
1, 2, 6, 24, 120, 720, 5040, 40320, 282240, 1764000, 10118880, 54888240, 289147152, 1510241892, 7937250452, 42396685874, 228146155304, 1228995185960, 6598619633952 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,2

COMMENTS

a(n)=n! for n<=8

LINKS

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

CROSSREFS

Sequence in context: A067455 A033646 A212310 * A173848 A154656 A179354

Adjacent sequences:  A177276 A177277 A177278 * A177280 A177281 A177282

KEYWORD

nonn

AUTHOR

R. H. Hardin May 06 2010

STATUS

approved

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Last modified April 24 12:45 EDT 2014. Contains 240983 sequences.