A025485 Number of iterations of function f(n) = ceil(sqrt(n))^2 - k on n required to force n <= 2.

0, 0, 0, 0, 0, 1, 1, 0, 0, 0, 2, 2, 1, 1, 0, 0, 0, 1, 1, 2, 2, 1, 1, 0, 0, 0, 3, 1, 1, 1, 2, 2, 1, 1, 0, 0, 0, 2, 3, 3, 1, 1, 1, 2, 2, 1, 1, 0, 0, 0, 1, 2, 2, 3, 3, 1, 1, 1, 2, 2, 1, 1, 0, 0, 0, 1, 1, 1, 2, 2, 3, 3, 1, 1, 1, 2, 2, 1, 1, 0, 0, 0, 2, 2, 1, 1, 1, 2, 2, 3, 3, 1, 1, 1, 2, 2, 1, 1, 0, 0, 0, 3, 3, 2, 2, 1, 1, 1