A179959 Number of permutations of 1..n with no adjacent elements within 5 in value.

1, 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 2, 352, 24440, 1019616, 33461568, 957913824, 25415753280, 649347224736, 16370397635328, 413619939152632

Offset: 0

Author

R. H. Hardin, Aug 03 2010

Keywords

• nonn

Extensions

a(0)-a(10), a(20) from Alois P. Heinz, Oct 27 2014

a(21) from Alois P. Heinz, Feb 10 2025