A177281 Number of permutations of 1..n with all adjacent differences <= 9 in absolute value.

1, 1, 2, 6, 24, 120, 720, 5040, 40320, 362880, 3628800, 32659200, 267805440, 2033498880, 14563332000, 100185340320, 672903217200, 4472291398032, 29721557854116, 199059839989844

Offset

0,3

Comments

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

Links

Table of n, a(n) for n=0..19.

Crossrefs

Sequence in context: A319212 A276844 A273697 * A173850 A154658 A179369

Adjacent sequences: A177278 A177279 A177280 * A177282 A177283 A177284

Keyword

nonn

Author

R. H. Hardin, May 06 2010

Status

approved