Sequence: 1/1, 1/4, 3/4, 1/9, 3/9, 5/9, 1/16, 3/16, 5/16, 7/16, 1/25...

[provasanteriores]

Let a(n) be the n-th term of the following sequence 1/1, 1/4, 3/4, 1/9, 3/9, 5/9, 1/16, 3/16, 5/16, 7/16, 1/25...
Find the maximal n satisfying a(n) ≥ 1/10. Answer: 190
Help-me please