Number of circular permutations of length n with no consecutive triples (i, i+d, i+2d) (mod n) for all d.
A174083
Number of circular permutations of length n with no consecutive triples (i, i+d, i+2d) (mod n) for all d.
Terms
- a(0) =4a(1) =0a(2) =40a(3) =168a(4) =1652a(5) =9408a(6) =117896a(7) =1019260a(8) =12737856a(9) =140794368a(10) =2072921376a(11) =25990014896a(12) =439692361160
External references
- oeis: A174083