Number of ascending runs of length n in the permutations of [2n].

A230382

Number of ascending runs of length n in the permutations of [2n].

Terms

    a(0) =1a(1) =2a(2) =21a(3) =312a(4) =5880a(5) =133920a(6) =3575880a(7) =109549440a(8) =3788104320a(9) =145957593600

External references