a(n) equals the coefficient of x^n in the (n+1)-th iteration of x*(1+x)/(1-x) for n>=1.
A185524
a(n) equals the coefficient of x^n in the (n+1)-th iteration of x*(1+x)/(1-x) for n>=1.
Terms
- a(0) =1a(1) =6a(2) =56a(3) =770a(4) =14272a(5) =335846a(6) =9623280a(7) =325812162a(8) =12743851808a(9) =565954103110
External references
- oeis: A185524