$a_{-i}=0$ for all positive i. We have the recurrence
$$ a_n = \sum_{i=1}^\infty b_ia_{n-m_i} $$
Where $m_i>0$ for all $i$.
$a_{-i}=0$ for all positive i. We have the recurrence
$$ a_n = \sum_{i=1}^\infty b_ia_{n-m_i} $$
Where $m_i>0$ for all $i$.