p56 B-heptomino shuttle

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p56 B-heptomino shuttle
x = 26, y = 21, rule = B3/S23 23b2o$23b2o3$6b2o16b2o$6b2o14bob2o$22bo$22bo$22bo2bo$6bo16b2o$5bob2o$b 2o2bo2bo$b2o5bo3$2b2o14b2o$ob2o14b2o$o$o$o2bo$b2o! #C [[ THUMBSIZE 2 THEME 6 GRID GRIDMAJOR 0 SUPPRESS THUMBLAUNCH ]] #C [[ AUTOSTART ]] #C [[ LOOP 56 GPS 8 THUMBSIZE 2 ]]
Pattern type Oscillator
Oscillator type Shuttle
Number of cells 45
Bounding box 28 × 21
Period 56
Mod 28
Heat 30.3
Volatility 0.94
Strict volatility 0.57
Discovered by David Buckingham
Year of discovery Unknown

P56 B-heptomino shuttle is a period-56 oscillator discovered in its original form (shown below) by David Buckingham sometime before May 1991,[1] being the first period 56 oscillator to be found.[note 1] It consists of a B-heptomino being hassled by two blockers and two blocks. In terms of its 45 cells, it is the smallest known period 56 oscillator.[2] The blockers interact with the B twice, once to supress the block, and another time to prevent the formation of a Herschel.

Image gallery

x = 41, y = 21, rule = B3/S23 32b4o$31bo4bob2o$31bo4bo3bo$34b2o4bo$14b2o15b2o4bo2bo$14b2o14bo2bo3bo 2bo$30bo2bo4b2o$30bo4b2o$30bo3bo4bo$14bo16b2obo4bo$7b2o4bob2o18b4o$4bo 8bo2bo$3bobo2b2o6bo$bobob3o2bo$bo2b6o$4b2ob2o17b2o$3b6o2bo14b2o$2bo2b 3obobo$3b2o2bobo$8bo$4b2o! #C [[ THUMBSIZE 2 THEME 6 GRID GRIDMAJOR 0 SUPPRESS THUMBLAUNCH ]] #C [[ THUMBSIZE 2 ]]
The original form of this oscillator using Kok's galaxies instead of blockers
(click above to open LifeViewer)
RLE: here Plaintext: here

See also


  1. A nontrivial period-56 oscillator, such as Kok's galaxy on 44P7.2, could have been constructed from two oscillators of lower period (such as p7 and p8), both of which were known by an earlier date. However, no such LCM oscillators were attested prior to the discovery of this oscillator on or before 1991.


  1. Dean Hickerson's oscillator stamp collection.
  2. Jason Summers' all-osc oscillators collection

External links