A177325 Number of permutations of n copies of 1..7 with all adjacent differences <= 2 in absolute value.

56, 148146, 788946320, 5712786772130, 49254897805981056

Offset

1,1

Links

Table of n, a(n) for n=1..5.

Crossrefs

Sequence in context: A009837 A308390 A093256 * A135315 A376666 A376673

Adjacent sequences: A177322 A177323 A177324 * A177326 A177327 A177328

Keyword

nonn

Author

R. H. Hardin May 06 2010

Status

approved