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A177279
Number of permutations of 1..n with all adjacent differences <= 7 in absolute value.
0
1, 1, 2, 6, 24, 120, 720, 5040, 40320, 282240, 1764000, 10118880, 54888240, 289147152, 1510241892, 7937250452, 42396685874, 228146155304, 1228995185960, 6598619633952, 35220099648960
OFFSET
0,3
COMMENTS
a(n) = n! for n <= 8.
CROSSREFS
Sequence in context: A276842 A364428 A273695 * A173848 A154656 A179354
KEYWORD
nonn
AUTHOR
R. H. Hardin, May 06 2010
EXTENSIONS
a(20) from Alois P. Heinz, Apr 04 2019
STATUS
approved