p40 B-heptomino shuttle

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p40 B-heptomino shuttle
x = 26, y = 23, rule = B3/S23 b2o20b2o$o2bo19b2o$o$o$ob2o20b2o$2b2o18bob2o$22bo$22bo$b2o13b2o4bo2bo$ b2o12bo2bo4b2o$15bo2bo$14b2ob2o$15b2o2$7bo10bo$6bobo8bobo$7bo4b2o4bo$ 10bo4bo$10bo4bo$10bo4bo$11bo2bo$9bobo2bobo$9b2o4b2o! #C [[ THUMBSIZE 2 THEME 6 GRID GRIDMAJOR 0 SUPPRESS THUMBLAUNCH ]] #C [[ AUTOSTART ]] #C [[ LOOP 40 GPS 8 THUMBSIZE 2 ]]
Pattern type Oscillator
Oscillator type Shuttle
Number of cells 68
Bounding box 28×23
Period 40
Mod 20
Heat 44.2
Volatility 0.88
Strict volatility 0.45
Discovered by David Buckingham
Year of discovery Unknown

P40 B-heptomino shuttle is a period-40 shuttle oscillator found by David Buckingham sometime before May 1991,[1] being the first period 40 oscillator to be discovered.[note 1] It consists of two blockers, two tubs, and a fumarole hassling a B-heptomino.

Image gallery

Generation 17 reveals that the object being hassled is a B-heptomino.

See also


  1. A nontrivial period-40 oscillator, such as octagon II on figure eight, could have been constructed from two oscillators of lower period (such as p5 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.


External links

  • 68P40.1 at Heinrich Koenig's Game of Life Object Catalogs