Try another version of this question Write an explicit formula for the sequence:
`a_n = `
Box 1: Enter your answer as an expression. Example: 3x^2+1, x/5, (a+b)/c
`{1/5, -1/(6), 1/(7), -1/(8), 1/(9), -1/(10), ...}`
Be sure your variables match those in the question `(-1)^(n+1)/(n+4)`