Number of permutations of [n] with alternating cycle size parities.

A286076

Number of permutations of [n] with alternating cycle size parities.

Terms

    a(0) =1a(1) =1a(2) =1a(3) =5a(4) =8a(5) =78a(6) =206a(7) =2722a(8) =10516a(9) =169544a(10) =883580a(11) =16569420a(12) =110272040a(13) =2339828920a(14) =19127099680a(15) =450962267600

External references