Question

Nth term fo 3,11,25,45

Answer 1

I think the answer may be 291

Answer 2

That's a progression, for each step you increase the total next number by 8+6.

So
1. 3+8=11
2. 11+8+6=25
3. 25+8+6+6=45
4. 45+8+6+6+6=71
5. 71+8+6+6+6+6=103
6.103+8+6+6+6+6+6=141
7.141+8+6+6+6+6+6+6=185
8.185+8+6+6+6+6+6+6+6=235
9.235+8+6+6+6+6+6+6+6+6=291