Free-for-All Friday is a number sequence challenge for today. Enjoy!

What's the missing number in the following series?

1, 5, 15, 34, 65, ?, 175, etc.

Here is my SOLUTION.

MY SOLUTION:

111.

The sequence is:

1 = 1
2 + 3 = 5
4 + 5 + 6 = 15
7 + 8 + 9 + 10 = 34
11 + 12 + 13 + 14 + 15 = 65
16 + 17 + 18 + 19 + 20 + 21 = 111
22 + 23 + 24 + 25 + 26 + 27 + 28 = 175
and so on.

NOTE: These types of puzzles sometimes lend themselves to multiple answers. If you came up with one that you feel is legitimately correct, feel free to share it (along with an explanation) in the comments. Have a great weekend!