Number of permutations of [2n+3] in which the longest increasing run has length n+3.

A230343

Number of permutations of [2n+3] in which the longest increasing run has length n+3.

Terms

    a(0) =1a(1) =8a(2) =99a(3) =1602a(4) =32010a(5) =761904a(6) =21064680a(7) =663848640a(8) =23500653120a(9) =923616691200

External references