\[a_{1} = - 3;\ \ a_{n + 1} = a_{n} + 2\]
\[a_{2} = a_{1} + 2 = - 3 + 2 = - 1;\ \ \ \]
\[a_{3} = a_{2} + 2 = - 1 + 2 = - 1;\]
\[a_{4} = a_{3} + 2 = 1 + 2 = 3.\]