A177279 Number of permutations of 1..n with all adjacent differences <= 7 in absolute value.

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.

Links

Table of n, a(n) for n=0..20.

Crossrefs

Sequence in context: A276842 A364428 A273695 * A173848 A154656 A179354

Adjacent sequences: A177276 A177277 A177278 * A177280 A177281 A177282

Keyword

nonn

Author

R. H. Hardin, May 06 2010

Extensions

a(20) from Alois P. Heinz, Apr 04 2019

Status

approved