EVANSTON—Alex Olah scored 19 points and grabbed eight rebounds as Northwestern beat Nebraska 65-54 in their regular-season finale on Sunday.Tre Demps added 17 points for the Wildcats, who secured the ninth seed and a first-round bye in next week’s Big Ten tournament in Indianapolis.Tai Webster and Andrew White III scored 13 points apiece for the Huskers, who ended up with the 11th seed. Shavon Shields added 11 points.NU (20-11, 8-10) has won three straight and four of six to set a school record for victories in a regular season. The Wildcats won 20 overall games in 2009-10 and 2010-11. The Wildcats have never made the NCAA Tournament and appear headed to the NIT unless they can win four straight games to win the Big Ten Tourament. NU has never gotten past the Big Ten quarterfinals.Nebraska (14-17, 6-12) has lost five straight and nine of its last 11. Shields was leading the Huskers with 16.7 points per game but went just 2-for-12 from the field.