Is this a suitable title?

In figure 1, there are $5$ triangles.
In figure 2, there are $16$ triangles.
In figure 3, there are $33$ triangles.
(For clarification):-
In figure 4, there are $56$ triangles.
In figure 5, there are $85$ triangles.

We see that in $n^{\text{th}}$ figure, there are $(4 × \displaystyle \sum_{i=1}^n i) + n^2$ triangles.

So, in ${2016}^{\text{th}}$ figure, there would be $(4 × \displaystyle \sum_{i=1}^{2016} n) + {2016}^2$ triangles.
= $2016 × 6050$ triangles.
= 12196800 triangles. $_\square$