Let a(0)=1. For n > 0, a(n) is the least integer greater than a(n-1) such that the polynomial 1/a(0) + x^1/a(1) +...+ x^n/a(n) has exactly n distinct real roots.

A220476

Let a(0)=1. For n > 0, a(n) is the least integer greater than a(n-1) such that the polynomial 1/a(0) + x^1/a(1) +...+ x^n/a(n) has exactly n distinct real roots.