Number of permutations p of [n] having no index i with |p(i)-i| = 3.
A324365
Number of permutations p of [n] having no index i with |p(i)-i| = 3.
Terms
- a(0) =1a(1) =1a(2) =2a(3) =6a(4) =14a(5) =53a(6) =265a(7) =1554a(8) =11024a(9) =90816a(10) =846032a(11) =8803826a(12) =101011765a(13) =1265197857a(14) =17167351014a(15) =250725968406
External references
- oeis: A324365