Number of permutations of length n with no consecutive triples i,i+d,i+2d (mod n) for all d.

A174081

Number of permutations of length n with no consecutive triples i,i+d,i+2d (mod n) for all d.

Terms

    a(0) =16a(1) =40a(2) =300a(3) =1764a(4) =17056a(5) =118908a(6) =1466840a(7) =14079340a(8) =184672896a(9) =2206738248a(10) =33901722288a(11) =458478528000

External references