Number of permutations of length n with no consecutive triples i,...i+r,...i+2r (mod n) for all r, and for all equal spacings d.
A174086
Number of permutations of length n with no consecutive triples i,...i+r,...i+2r (mod n) for all r, and for all equal spacings d.
Terms
- a(0) =16a(1) =40a(2) =204a(3) =840a(4) =6272a(5) =35856a(6) =378000a(7) =2638460a(8) =28387728a(9) =249444936a(10) =3275745564a(11) =30770034480
External references
- oeis: A174086