Number T(n,k) of permutations p of [n] such that |p(i+k) - p(i)| <> k for i in [n-k]; triangle T(n,k), n>=0, 0<=k<=n, read by rows.
A333706
Number T(n,k) of permutations p of [n] such that |p(i+k) - p(i)| <> k for i in [n-k]; triangle T(n,k), n>=0, 0<=k<=n, read by rows.
Terms
- a(0) =1a(1) =0a(2) =1a(3) =0a(4) =0a(5) =2a(6) =0a(7) =0a(8) =4a(9) =6a(10) =0a(11) =2a(12) =16a(13) =20a(14) =24a(15) =0a(16) =14a(17) =44a(18) =80a(19) =108a(20) =120a(21) =0a(22) =90a(23) =200a(24) =384a(25) =544a(26) =672a(27) =720a(28) =0a(29) =646
External references
- oeis: A333706