Number of permutations of [n] such that the minimal distance between elements of the same cycle equals one, a(1)=1 by convention.

A276975

Number of permutations of [n] such that the minimal distance between elements of the same cycle equals one, a(1)=1 by convention.

Terms

    a(0) =1a(1) =1a(2) =4a(3) =19a(4) =103a(5) =651a(6) =4702a(7) =38413a(8) =350559a(9) =3539511a(10) =39196758a(11) =472612883a(12) =6165080443a(13) =86526834271

External references