U(ρ) = ρˡ⁺¹ exp(-ρ/2) Fₙᵣ(ρ)

n ≡ nᵣ - l - 1 ⇒ l ≥ n-1 

n│  l  │mₗ
─┼─────┼───────────
1│0    │0
2│0,1  │-1,0,1
3│0,1,2│-2,-1,0,1,2


(pic) Fₙᵣ has n roots or nodes