Mathematics · Alpha-Numeric Sequence Puzzle

Refer to the given series and answer the question that follows (all numbers are single-digit numbers only, and counting is done from left to right). (Left) 5 9 8 9 7 2 3 9 8 7 2 1 5 5 8 7 9 3 5 3 1 4 6 4 4 9 7 4 7 (Right) How many such even digits are there, each of which is immediately preceded by a perfect square and immediately followed by an even digit? (Note: 1 is considered a perfect square.)