Question

13, 74, 290,650........?

Answer 1

2^2 + 3^2 = 13

5^2 + 7^2 = 74

11^2 + 13^2 = 290

17^2 + 19^2 = 650

23^2 + 29^2 = 1370

so,,

the answer is

13, 74, 290, 650, 1370.