What will come at the place of question mark ? 6, 13, 28, 59, ?, 249.

The answer is 122.

The sequence is $a_n = a_{n-1} + (n-1)^2$, where $a_1 = 6$.

Here is

448 288 448s170.8 0 213.4-11.5c23.5-6.3 42-24.2 48.3-47.8 11.4-42.9 11.4-132.3 11.4-132.3s0-89.4-11.4-132.3zm-317.5 213.5V175.2l142.7 81.2-142.7 81.2z"/> Subscribe on YouTube