#Life 1.05
#D Orthogonal sawtooth with expansion factor 21
#D Population is unbounded but does not tend to infinity.  Its graph is
#D a sawtooth function with ever-increasing teeth.  More specifically,
#D the population in generation  t = 18*21^n + 222  (n>=0),  is
#D 7t/60 + 1290,  but the population in generation  6*21^n + 193  (n>=1)
#D is only  1212.
#D This uses a spark from a c/3 orthogonal spaceship ("turtle") to turn
#D a HWSS into a loaf, which is then pulled back by pairs of LWSSs.  When
#D the loaf is pulled all the way back, another HWSS is fired toward the
#D c/3, starting the cycle again.  The HWSS synthesis, using 2 gliders,
#D a Kok's galaxy, and a figure 8, is due to David Buckingham.
#D This was the first sawtooth built.
#D Dean Hickerson, dean@ucdmath.ucdavis.edu  4/10/91
#N
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