login

Year-end appeal: Please make a donation to the OEIS Foundation to support ongoing development and maintenance of the OEIS. We are now in our 61st year, we have over 378,000 sequences, and we’ve reached 11,000 citations (which often say “discovered thanks to the OEIS”).

A177306
Number of permutations of 6 copies of 1..n with all adjacent differences <= 3 in absolute value.
0
1, 1, 924, 17153136, 2308743493056, 71614356453896256, 1097239851330486263400
OFFSET
0,3
COMMENTS
a(n) = (6n)!/720^n for n<=4.
CROSSREFS
Cf. A248814.
Sequence in context: A351485 A362171 A177305 * A248814 A172558 A229778
KEYWORD
nonn
AUTHOR
R. H. Hardin, May 06 2010
STATUS
approved