Since there's some people still saying that it's fraud, here's what the Indiana, Kansas, and New Jersey Powerball play slips look like. (Disclaimer: Got the images from Google)
As a reminder, the numbers were: 3-19-35-51-67-15
Indiana:
Kansas:
New Jersey:
As you can see, some play slips from PB have the numbers in a straight vertical line or diagonal line. The reason why there are so many winners is because some people pick numbers like that. With a pattern.
This is also the reason why many people do quick picks for random numbers; it's because chances are if they use birthdays or some number sequence with a pattern, they'd have to share the jackpot with others if they win with that numerical pattern.
Anyways, you can stop with the fraud allegations. That many people can win with a pattern is also random and their good luck.