A177319 Number of permutations of n copies of 1..7 with all adjacent differences <= 1 in absolute value.

1, 2, 148, 41618, 16699380, 8039989002, 4339892975512, 2535604038015218, 1570273521448103668, 1016915629343040544250, 682308706348352869913148, 471167961102713571612302730, 333217453890900855796193690520, 240438319207137787818120695999370

Offset

0,2

Links

Andrew Howroyd, Table of n, a(n) for n = 0..100

Crossrefs

Row n=7 of A331562.

Sequence in context: A316889 A251863 A110624 * A333495 A175974 A062596

Adjacent sequences: A177316 A177317 A177318 * A177320 A177321 A177322

Keyword

nonn

Author

R. H. Hardin, May 06 2010

Extensions

a(0)=1 prepended by Alois P. Heinz, Jan 20 2020

Terms a(8) and beyond from Andrew Howroyd, May 16 2020

Status

approved