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A177310 Number of permutations of 8 copies of 1..n with all adjacent differences <= 1 in absolute value. 2
1, 1, 12870, 6077196, 5650739930, 3772321496064, 2514046004253110, 1570273521448103668, 951645881858020642746, 560523113474283819256640, 323221203836407773725200718, 183122229346363470922528553652, 102256611847518844993947706000234 (list; graph; refs; listen; history; text; internal format)
OFFSET

0,3

COMMENTS

a(n) = (8n)!/40320^n = A172609(n) for n<=2.

LINKS

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

CROSSREFS

Column k=8 of A331562.

Cf. A172609.

Sequence in context: A024760 A245861 A068359 * A140917 A177311 A177312

Adjacent sequences:  A177307 A177308 A177309 * A177311 A177312 A177313

KEYWORD

nonn

AUTHOR

R. H. Hardin, May 06 2010

EXTENSIONS

a(0)=1 prepended by Alois P. Heinz, Jan 21 2020

Terms a(7) and beyond from Andrew Howroyd, May 15 2020

STATUS

approved

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Last modified October 21 15:18 EDT 2021. Contains 348155 sequences. (Running on oeis4.)