Number of permutations p of [n] such that min_{j=1..n} |p(j)-j| = 1.
A296050
Number of permutations p of [n] such that min_{j=1..n} |p(j)-j| = 1.
Terms
- a(0) =0a(1) =0a(2) =1a(3) =2a(4) =8a(5) =40a(6) =236a(7) =1648a(8) =13125a(9) =117794a(10) =1175224a(11) =12903874a(12) =154615096a(13) =2007498192a(14) =28075470833a(15) =420753819282
External references
- oeis: A296050