x y

2 289
3 459
4 629
5 799

4 answers

+70 at each step
289 = 17*17
459 = 17*27
629 = 17*37
799 = 17*47

see what you can do with that.
oobleck meant 170 between consecutive numbers
That pattern is easier than mine
go with Reiny. I didn't look too closely ...