There should be no difference if you play the same numbers each week or if you change the numbers every week.
If you are flipping a coin or throwing dice, the outcome should be totally independent each time.
This, of course, depends on the randomness of the numbers.
There might be some oversight in the process in some individual lottery, and you cannot analyze the problem without knowing the individual selection process.
But if the numbers are truly random, each game is an independent entity, and the odds do not depend on what happened in a previous game.
