Secondary diagonal of rectangular table A124540: a(n) = A124540(n+1,n).

A124548

Secondary diagonal of rectangular table A124540: a(n) = A124540(n+1,n).

Terms

    a(0) =1a(1) =2a(2) =15a(3) =156a(4) =1995a(5) =29658a(6) =495922a(7) =9140344a(8) =183201255a(9) =3954149640a(10) =91212812647

External references