login
A177302
Number of permutations of 5 copies of 1..n with all adjacent differences <= 2 in absolute value.
0
1, 1, 252, 756756, 457507512, 184619047020, 97087382008034, 49254897805981056, 22802419346927105088
OFFSET
0,3
COMMENTS
a(n) = (5n)!/120^n for n<=3.
CROSSREFS
Cf. A014609.
Sequence in context: A362170 A203062 A259452 * A177303 A014609 A172557
KEYWORD
nonn,more
AUTHOR
R. H. Hardin, May 06 2010
EXTENSIONS
a(0), a(8) from Alois P. Heinz, Jan 19 2016
STATUS
approved