seventeen times
... that the Denver Broncos, who made the National Football League playoffs seventeen times between 1977 and 2005, did not make the playoffs at all in their first seventeen seasons?
... that the <a href="./Denver_Broncos" id="mwFVo" rel="mw:WikiLink" title="Denver Broncos">Denver Broncos</a>, who made the <a class="mw-redirect" href="./National_Football_League_playoffs" id="mwFVs" rel="mw:WikiLink" title="National Football League playoffs">National Football League playoffs</a> <b id="mwFVw"><a class="mw-redirect" href="./Denver_Broncos_seasons" id="mwFV0" rel="mw:WikiLink" title="Denver Broncos seasons">seventeen times</a></b> between <a href="./1977_NFL_season" id="mwFV4" rel="mw:WikiLink" title="1977 NFL season">1977</a> and <a href="./2005_NFL_season" id="mwFV8" rel="mw:WikiLink" title="2005 NFL season">2005</a>, did not make the playoffs at all in their first seventeen <a href="./Season_(sports)" id="mwFWA" rel="mw:WikiLink" title="Season (sports)">seasons</a>?