%N Period of oscillator reached starting with a segment of n consecutive live cells and applying the LongLife 2D rule (see comment).
%C LongLife rule : birth occurs if dead cell has 3,4 or 5 neighbors. Survival occurs if live cell has 5 neighbors. (Sequence computed using LifeLab for mac).
%H Eric Weisstein's World of Mathematics, <a href="https://mathworld.wolfram.com/GameofLife.html">Game of Life</a>.
%A _Benoit Cloitre_, Sep 22 2003