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A177301
Number of permutations of 5 copies of 1..n with all adjacent differences <= 1 in absolute value.
2
1, 1, 252, 7002, 284002, 8956752, 276285002, 8039989002, 226901044252, 6232521421502, 167765555015002, 4441865811412752, 116042171156004002, 2998175631045512002, 76751828260736962252, 1949598912568702682502, 49197330547669842130002, 1234523426440511782592752
OFFSET
0,3
COMMENTS
a(n) = (5n)!/120^n = A014609(n) for n<=2.
LINKS
CROSSREFS
Cf. A014609.
Column k=5 of A331562.
Sequence in context: A250085 A024018 A270853 * A250376 A329755 A109924
KEYWORD
nonn
AUTHOR
R. H. Hardin, May 06 2010
EXTENSIONS
a(10) from Alois P. Heinz, Jan 21 2020
Terms a(11) and beyond from Andrew Howroyd, May 15 2020
STATUS
approved