A177301 Number of permutations of 5 copies of 1..n with all adjacent differences <= 1 in absolute value.

1, 1, 252, 7002, 284002, 8956752, 276285002, 8039989002, 226901044252, 6232521421502, 167765555015002, 4441865811412752, 116042171156004002, 2998175631045512002, 76751828260736962252, 1949598912568702682502, 49197330547669842130002, 1234523426440511782592752

Offset: 0

Author

R. H. Hardin, May 06 2010

Keywords

• nonn

Comments

a(n) = (5n)!/120^n = A014609(n) for n<=2.

Links

• Andrew Howroyd, Table of n, a(n) for n = 0..200

Crossrefs

Cf. A014609.

Column k=5 of A331562.

Extensions

a(10) from Alois P. Heinz, Jan 21 2020

Terms a(11) and beyond from Andrew Howroyd, May 15 2020