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A174082
Number of circular permutations of (0,1,...,n-1) with no consecutive triples i,i+d,i+2d for all d>0.
3
1, 1, 1, 5, 18, 91, 544, 3842, 30573, 277532, 2770405, 30591153, 366836571
OFFSET
1,4
COMMENTS
Circular permutations are permutations whose indices are from the ring of integers modulo n.
EXAMPLE
For n=4 there is only (4-1)!-a(4) = 1 circular permutation with a consecutive triple i,i+d,i+2d. It is (0,1,2,3).
CROSSREFS
KEYWORD
nonn,more
AUTHOR
Isaac Lambert, Mar 15 2010
EXTENSIONS
a(1)-a(3) and a(10)-a(13) from Pontus von Brömssen, Feb 11 2024
STATUS
approved