When looking towards the stage from floor seats, lower number seats (like seat 1) are on the right side. So when section 1 is on the right side of the floor (like it is for the Adele show), seat 1 is near the 100s seating sections and higher-number seats are closer to center stage.
For the Adele concert, section 1 is a unique setup. For most concerts at Philips Arena, Floor sections 1-3 are at the front and each include 14 seats per row.
For the Adele show, only sections 1 and 2 are the front. In these sections, rows A-F are separated from rows G-V and are set at a slightly different angle. Given this unique setup, nearly every row in Floor sections 1 and 2 have a varying number of seats.
Generally speaking, most rows have roughly 15 seats with up to 25 seats in some of the larger (wider) rows. In all cases, seat 1 is on the right side of the section when looking towards the stage.