OFFSET
1,6
COMMENTS
For n>1, a(n)/2 is the number of Hamiltonian paths on the graph with vertex set {1,...,n} where i is adjacent to j iff |i-j| is in {3,4}.
LINKS
Andrew Howroyd, Table of n, a(n) for n = 1..500
W. Edwin Clark, "permutations p in S_n such that m <= |p(i)-p(i+1)| <= M for i from 1 to n-1", SeqFan Discussion, Mar 2010.
CROSSREFS
KEYWORD
nonn
AUTHOR
W. Edwin Clark, Mar 27 2010
EXTENSIONS
a(28)-a(38) from Robert Gerbicz, Nov 27 2010
a(39)-a(45) from Andrew Howroyd, Apr 05 2016
STATUS
approved