Number of permutations p of [n] satisfying |p(i+8) - p(i)| <> 8 for all 1 <= i <= n-8.
A360386
Number of permutations p of [n] satisfying |p(i+8) - p(i)| <> 8 for all 1 <= i <= n-8.
Terms
- a(0) =1a(1) =1a(2) =2a(3) =6a(4) =24a(5) =120a(6) =720a(7) =5040a(8) =40320a(9) =352800a(10) =3312000a(11) =33742080a(12) =373948416a(13) =4498421760a(14) =58506854400a(15) =819095961600
External references
- oeis: A360386