Number of paths from (0,0) to (n,0), never going below the x-axis, using steps U=(1,1), H=(1,0) and D=(1,-1), where the H steps come in five colors.

A182401

Number of paths from (0,0) to (n,0), never going below the x-axis, using steps U=(1,1), H=(1,0) and D=(1,-1), where the H steps come in five colors.

Terms

    a(0) =1a(1) =5a(2) =26a(3) =140a(4) =777a(5) =4425a(6) =25755a(7) =152675a(8) =919139a(9) =5606255a(10) =34578292a(11) =215322310a(12) =1351978807a(13) =8550394455a(14) =54419811354a(15) =348309105300

External references