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As of August 12, 2020, I think this is still the full list of all of the objects for which 1G seeds have ever been constructed:

  • star, eater2 variant, and almost p256 oscillator from Golly's Patterns/Life/Syntheses/blockic-and-blockish-seeds.rle, from way back
  • LWSS, MWSS, and HWSS (knightlife and others)
  • Mitchell Riley's Cordership breeder pattern, Golly's Patterns/Life/Breeders/switch-engine-breeder-MR.rle
  • loafer
  • 3-engine Cordership
  • 2-engine Cordership
  • Gosper glider gun
  • 58P5H1V1
  • space rake
  • space backrake
  • crab
  • crab-based wickstretcher
  • double wickstretcher

This excludes various seed constellations that produce gliders or glider salvos -- otherwise unlistably many one-time turners would technically count. An example would be the seed constellation in the original adjustable volatility-1 oscillator from November 2018. There might also be a random "meteor shower" seed somewhere or other, maybe for cleaning up a Silver reflector. (?)

I have the feeling I'm probably forgetting some obvious additional class of seed patterns, but at the moment I can't seem to think of anything else to add to the list. Dvgrn (talk) 15:21, 12 August 2020 (UTC)