Pi orbital

Pi orbital is a period-168 oscillator that was found by Noam Elkies on August 22, 1995.[1] It works by using four crowns and four blocks to turn a pi heptomino ninety degrees every 42 generations. A second pi heptomino can be inserted to reduce the period to 84. On March 26, 2009 Nicolay Beluchenko found a relatively small period 12 sparker that could replace the crowns. On April 6, 2010 Matthias Merzenich discovered the Blocked p4-4 period 4 oscillator that also supports the oscillator.

Pi orbital
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Pattern type Oscillator
Number of cells 305
Bounding box 59×59
Period 168
Mod 42
Heat 270.7
Volatility 0.91
Strict volatility 0.61
Discovered by Noam Elkies
Year of discovery 1995
An alternate version of pi orbital using Nicolay Beluchenko's period 12 oscillator
RLE: here
Alternate form by Matthias Merzenich
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See also

References
  1. Jason Summers' jslife pattern collection. Retrieved on March 14, 2020.
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