April 18 (Reuters) – Following is the schedule for thebest-of-seven, first-round series in the National BasketballAssociation playoffs (prefix number denotes seeding, *-game ifneeded): WESTERN CONFERENCE 1-Oklahoma City vs. 8-Houston Game 1 – Sunday, April 21, at Oklahoma City Game 2 – Wednesday, April 24, at Oklahoma City Game 3 – Saturday, April 27, at Houston Game 4 – Monday, April 29, at Houston Game 5 * Wednesday, May 1, at Oklahoma City Game 6 * Friday, May 3, at Houston Game 7 * Sunday, May 5, at Oklahoma City 2-San Antonio vs. 7-L.A. …