Number of circular permutations of length n with no consecutive triples i,i+2,i+4 or i,i-2,i-4.
A174078
Number of circular permutations of length n with no consecutive triples i,i+2,i+4 or i,i-2,i-4.
Terms
- a(0) =20a(1) =100a(2) =600a(3) =4244a(4) =34264a(5) =311424a(6) =3143912a(7) =34833964a(8) =420917638a(9) =5513592091a(10) =77715460917
External references
- oeis: A174078