Déterminer tous les entiers $0\le a < b< c<d<e<f<g<h$ tels que
$$ \color{red}{\binom{b}{a}} + \color{orange}{\binom{c}{b}} + \color{gold}{\binom{d}{c}} + \color{limegreen}{\binom{e}{d}} + \color{teal}{\binom{f}{e}} + \color{royalblue}{\binom{g}{f}} + \color{darkorchid}{\binom{h}{g}} = \color{purple}{2020} $$
et figure parmi ces coefficients binomiaux $\binom{20}{19}$.
