Number of horizontal segments in all Schroeder paths of length 2n (a horizontal segment is a maximal string of horizontal steps).

A104550

Number of horizontal segments in all Schroeder paths of length 2n (a horizontal segment is a maximal string of horizontal steps).

Terms

    a(0) =1a(1) =4a(2) =20a(3) =104a(4) =552a(5) =2972a(6) =16172a(7) =88720a(8) =489872a(9) =2719028a(10) =15157188a(11) =84799992a(12) =475894200a(13) =2677788492a(14) =15102309468a(15) =85347160608a(16) =483183316512

External references