One thing that sets PEAC apart from the Fibonacci and Pisano series is the parity, or mod 2 remainder. When you take the natural sequence 0, 1, 1, 2, 3, 5, 8, 13, 21, 34, 55, 89, 144, 233, 377, 610, 987, 1597... The mod 2 is 0, 1, 1, 0, 1, 1, 0, 1, 1,...