The number of small Schröder paths such that the area between the path and the x-axis contains n up-triangles.

A326793

The number of small Schröder paths such that the area between the path and the x-axis contains n up-triangles.

Terms

    a(0) =1a(1) =1a(2) =2a(3) =5a(4) =12a(5) =30a(6) =75a(7) =188a(8) =472a(9) =1186a(10) =2981a(11) =7494a(12) =18842a(13) =47376a(14) =119126a(15) =299545a(16) =753220a(17) =1894018a(18) =4762640a(19) =11976010a(20) =30114592a(21) =75725485a(22) =190417684a(23) =478820320a(24) =1204031670a(25) =3027633300a(26) =7613224740a(27) =19144059492a(28) =48139261637a(29) =121050006438

External references