Define the number sequence {5n}

Question


n1 = {3,6,9,12,15, … ) recursively�

Answer 1

Looks like we are adding 3 to the previous term

n₁ = 3
n_n+1 = n_n + 3

Don't know where the {5n} comes in, are you interested in only the
n_n , where n consists of multiples of 5?
Do you want the n_n values multiplied by 5?

You decide.