Number of permutations p of [n] satisfying |p(i+7) - p(i)| <> 7 for all 1 <= i <= n-7.
A360384
Number of permutations p of [n] satisfying |p(i+7) - p(i)| <> 7 for all 1 <= i <= n-7.
Terms
- a(0) =1a(1) =1a(2) =2a(3) =6a(4) =24a(5) =120a(6) =720a(7) =5040a(8) =38880a(9) =323520a(10) =2953728a(11) =29666304a(12) =326584320a(13) =3919011840a(14) =50969640960a(15) =705722941440
External references
- oeis: A360384