What is an explicit equation?

An explicit equation is an equation used to find a term in a sequence without using the any previous terms. For example, if I have the set of numbers 1, 3, 5, 7, 9, my explicit equation is F (n) = 2 (n-1) + 1. If I plug 1 in for n, I get F (1) = 2 (0) + 1, which is 1, my first term.

Hope this made sense.