Number of ballot sequences of length n having largest descent 3.

A244199

Number of ballot sequences of length n having largest descent 3.

Terms

    a(0) =1a(1) =6a(2) =31a(3) =133a(4) =586a(5) =2453a(6) =10357a(7) =43462a(8) =183519a(9) =776632a(10) =3314263a(11) =14236474a(12) =61673638a(13) =269354538a(14) =1186290977a(15) =5269574378a(16) =23605973532a(17) =106655907009a(18) =485864276503

External references