A177323 Number of permutations of n copies of 1..5 with all adjacent differences <= 2 in absolute value.

1, 20, 3846, 1173512, 439192790, 184619047020, 83659800759150, 39956935830445136, 19840440079542390102, 10150867545062935511900, 5318188148539280718247346, 2840554565353471719458163720, 1541655842245048541457829216574, 848050687248154968606053714426108

Offset

0,2

Links

Martin Fuller, Table of n, a(n) for n = 0..32 (terms n=1..15 from R. H. Hardin)

Crossrefs

Sequence in context: A028458 A225989 A332265 * A184891 A279297 A079759

Adjacent sequences: A177320 A177321 A177322 * A177324 A177325 A177326

Keyword

nonn

Author

R. H. Hardin, May 06 2010

Extensions

a(0) = 1 prepended by Joerg Arndt, Jun 08 2025

Status

approved