Certain directed lattice paths.

A260776

Certain directed lattice paths.

Terms

    a(0) =1a(1) =5a(2) =60a(3) =1001a(4) =19380a(5) =408595a(6) =9104550a(7) =210905400a(8) =5028168132a(9) =122563178210

External references