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A177280
Number of permutations of 1..n with all adjacent differences <= 8 in absolute value.
0
1, 1, 2, 6, 24, 120, 720, 5040, 40320, 362880, 2903040, 20966400, 139577760, 876615840, 5310073200, 31605605712, 187515117348, 1120681770068, 6797256099562, 41549526380408
OFFSET
0,3
COMMENTS
a(n) = n! for n <= 9.
CROSSREFS
Sequence in context: A319211 A276843 A273696 * A173849 A154657 A179361
KEYWORD
nonn
AUTHOR
R. H. Hardin, May 06 2010
STATUS
approved