To find the 25th term of the sequence defined by the formula \( a_n = n + 50 \), we need to substitute \( n = 25 \) into the formula.
\[ a_{25} = 25 + 50 \]
Calculating this gives:
\[ a_{25} = 75 \]
Thus, the 25th term of the sequence is \( \boxed{75} \).