Examples are
$$
Y_{00}=\sqrt{\frac{1}{4\pi}},
$$
for \( l=m_l=0 \),
$$
Y_{10}=\sqrt{\frac{3}{4\pi}}cos(\theta),
$$
for \( l=1 \) and \( m_l=0 \),
$$
Y_{1\pm 1}=\sqrt{\frac{3}{8\pi}}sin(\theta)exp(\pm i\phi),
$$
for \( l=1 \) and \( m_l=\pm 1 \),
$$
Y_{20}=\sqrt{\frac{5}{16\pi}}(3cos^2(\theta)-1)
$$
for \( l=2 \) and \( m_l=0 \) etc.