Number of permutations of [2n] in which the longest increasing run has length n.

A230341

Number of permutations of [2n] in which the longest increasing run has length n.

Terms

    a(0) =1a(1) =1a(2) =16a(3) =293a(4) =5811a(5) =133669a(6) =3574957a(7) =109546009a(8) =3788091451a(9) =145957544981

External references