what is the sequence of these numbers 1, 9, 25, 49, 81, 121, 159

Question

what is the sequence

Answer 1

(2n-1)^2

Answer 2

This sequence can describe pi, because pi = 3 + 1/(6+9/(6+25/(6+49/(6+81/(6+121/(6+159/(6+...)))))))

Answer 3

It is the sequence square of all prime number.Like: 1square=1. 3square=9 5square=25.

Comments

9 isn't a prime number and 159 is not a perfect square. Perhaps 159 should have been 169, then it would be the squares of odd numbers.