38P7.2

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38P7.2
x = 13, y = 11, rule = B3/S23 4bo3bo$o2bobobobo2bo$obo2bobo2bobo$bo2b2ob2o2bo$5bobo$2b2o5b2o$2bo7bo$ 4bo3bo2$bo2bo3bo2bo$2b2o5b2o! #C [[ THUMBSIZE 2 THEME 6 GRID GRIDMAJOR 0 SUPPRESS THUMBLAUNCH ]] #C [[ AUTOSTART ]] #C [[ ZOOM 27 GPS 3 LOOP 7 HEIGHT 480 WIDTH 480 ]]
Pattern type Oscillator
Number of cells 38
Bounding box 15×11
Period 7
Mod 7
Heat 23.4
Volatility 0.82
Strict volatility 0.82
Discovered by Nicolay Beluchenko
Year of discovery 2009

38P7.2 is an unnamed period-7 oscillator discovered by Nicolay Beluchenko on February 17, 2009.[1] It provides four sparks in generation 4 that are useful in creating p7 bumper as well as non-trivial oscillators of higher periods such as snacker on 38P7.2. A variation of this oscillator can be created by displacing one half of the oscillator by two cells.

It first appeared semi-naturally in March 2016.[2] gmc_nxtman found an 18-glider synthesis of this oscillator on August 13, 2017.[3] Goldtiger997 improved this to 14 gliders on February 12, 2018.[4]

In March 2018, Josh Ball found a pattern that can be stabilized by copies of 38P7.2 without blocks.[5]

In May 2022, Charity Engine found 38P7.3, also known as meatball, in the C2_1 census on Catagolue. It has some of the same utility as 38P7.2, in a slightly smaller package.[6]

Gallery

x = 13, y = 13, rule = B3/S23 4bo$o2bobo$obo2bo2bo$bo2b2obobo2bo$5bobo2bobo$2b2o3b2o2bo$2bo4bo$4bo4b 2o$10bo$bo2bo3bo$2b2o$8bo2bo$9b2o! #C [[ THUMBSIZE 2 THEME 6 GRID GRIDMAJOR 0 SUPPRESS THUMBLAUNCH ]] #C [[ THUMBSIZE 2 ]]
An alternate form of this oscillator
(click above to open LifeViewer)
RLE: here Plaintext: here
x = 24, y = 20, rule = B3/S23 o9bo$3o5b3o$3bo3bo$2b2o3b2o6bo3bo$11bo2bobobobo2bo$5bo5bobo2bobo2bobo$ 5bo6bo2b2ob2o2bo$4bobo9bobo$5bo7b2o5b2o$5bo7bo7bo$5bo9bo3bo$5bo$4bobo 5bo2bo3bo2bo$5bo7b2o5b2o$5bo2$2b2o3b2o$3bo3bo$3o5b3o$o9bo! #C [[ THUMBSIZE 2 THEME 6 GRID GRIDMAJOR 0 SUPPRESS THUMBLAUNCH ]] #C [[ THUMBSIZE 2 ]]
Snacker on 38P7.2, the smallest
known p63 oscillator by population
(click above to open LifeViewer)
RLE: here Plaintext: here

See also

References

  1. Jason Summers' all-osc pattern collection.
  2. Adam P. Goucher (March 19, 2016). Re: Soup search results (discussion thread) at the ConwayLife.com forums
  3. gmc_nxtman (August 13, 2017). Re: Soup Search Results (discussion thread) at the ConwayLife.com forums
  4. Goldtiger997 (February 12, 2018). Re: Synthesising Oscillators (discussion thread) at the ConwayLife.com forums
  5. Josh Ball (March 27, 2018). Re: Oscillator Discussion Thread (discussion thread) at the ConwayLife.com forums
  6. Tanner Jacobi (May 28, 2022). Re: Oscillator Discussion Thread (discussion thread) at the ConwayLife.com forums

External links

  • 38P7.2 at Heinrich Koenig's Game of Life Object Catalogs