You can put this solution on YOUR website! Simpler than you think. Not a trick question.
The problem says that term number is
If that is the formula given, the 26th term is
The first term is ,
The second term is
The third term is
The sequence is 4, 6, 8, ....
It's the even numbers from 4 up.
It's an arithmetic sequence with first term and common difference .