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A177313 Number of permutations of 9 copies of 1..n with all adjacent differences <= 1 in absolute value. 2
1, 1, 48620, 60110030, 161686253810, 304100156874800, 574996024253854586, 1016915629343040544250, 1745708356607370063330620, 2911820015993491302722966990, 4754502826758413615581742528138, 7626389809822483147908697112197520, 12055478550658617275428327115583119762 (list; graph; refs; listen; history; text; internal format)
OFFSET
0,3
COMMENTS
a(n) = (9n)!/362880^n = A172613(n) for n<=2.
LINKS
CROSSREFS
Column k=9 of A331562.
Cf. A172613.
Sequence in context: A024753 A024761 A245862 * A140924 A351488 A177314
KEYWORD
nonn
AUTHOR
R. H. Hardin, May 06 2010
EXTENSIONS
a(0)=1 prepended by Alois P. Heinz, Jan 20 2020
Terms a(7) and beyond from Andrew Howroyd, May 15 2020
STATUS
approved

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Last modified March 1 03:27 EST 2024. Contains 370430 sequences. (Running on oeis4.)