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A177281 Number of permutations of 1..n with all adjacent differences <= 9 in absolute value. 0
1, 2, 6, 24, 120, 720, 5040, 40320, 362880, 3628800, 32659200, 267805440, 2033498880, 14563332000, 100185340320, 672903217200, 4472291398032, 29721557854116, 199059839989844 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,2

COMMENTS

a(n)=n! for n<=10

LINKS

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

CROSSREFS

Sequence in context: A072133 A230232 A232985 * A173850 A154658 A179369

Adjacent sequences:  A177278 A177279 A177280 * A177282 A177283 A177284

KEYWORD

nonn

AUTHOR

R. H. Hardin May 06 2010

STATUS

approved

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Last modified August 28 05:09 EDT 2015. Contains 261118 sequences.