Sum of heights of all skew Dyck paths of semilength n.

Terms

a(0) =1a(1) =5a(2) =23a(3) =103a(4) =462a(5) =2086a(6) =9493a(7) =43521a(8) =200855a(9) =932429a(10) =4350995a(11) =20395349a(12) =95987113a(13) =453354623a(14) =2148027772a(15) =10206485598a(16) =48621125308a(17) =232156538970