Number of permutations of [n] with no fixed points where adjacent elements differ by at least 3.
A381461
Number of permutations of [n] with no fixed points where adjacent elements differ by at least 3.
Terms
- a(0) =1a(1) =0a(2) =0a(3) =0a(4) =0a(5) =0a(6) =2a(7) =8a(8) =115a(9) =1274a(10) =15099a(11) =179628a(12) =2260064a(13) =30534802a(14) =441269110a(15) =6789665680a(16) =110947884520
External references
- oeis: A381461