The loft-like, rustic-moderninteriors in this renovatedtriplex could be straight out of ahip Brooklyn brownstone–except they can be foundon a sereneSeminaryblockamid the galleries and condos of primeWest Chelsea. But the townhouse at454 West 20th Streethas some coolcred beyond its on-trend finishes: Original hipster Jack Kerouac reportedly composed his seminal novel “On the Road” in 1951 while in residence here.