IMAS 2017 — Upper Primary Grades 5–6 — Round 1 Question 3

Positive integers are arranged in the array as shown below, what is the sum of all the integers located on the fifth row ? $\begin{array}{ccccccc}&&&1&&&\\&&2&3&4&&\\&5&6&7&8&9&\\10&11&12&13&14&15&16\\&&&\vdots&&&\end{array}$