Hi ,
Your number sequence will be
4 , 6, 9, 6, 14, 6, ?"[19"]
there are two series 1st series is increasing +5
and 2nd series 6 is constant
0, 9, 36, 81, 144, ?["225"]
Here square of 0 , square of 0+3, square of 3+3=6, square of 6+3=9, square 9+3=12, square of 12+3=15 =225
If am i right then please come over the chat as we can discuss more about the project.
Waiting for your response.
Thank You