Question: DISCRETE MATH For each integer n >= 1, let a n be the number of ternary strings (that is, strings made up of 0s, 1s

DISCRETE MATH

For each integer n >= 1, let a_n be the number of ternary strings (that is, strings made up of 0s, 1s and 2s) of length n that do not contain two consecutive 1s.

What is a₂ ?

Given that a₃= 22 and a₄= 60, what is a₅

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