p40 B-heptomino shuttle

	p40 B-heptomino shuttle
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Pattern type	Oscillator
Oscillator type	Shuttle
Number of cells	68
Bounding box	28 × 23
Period	40 (mod: 20)
Heat	44.2
Volatility	0.88 \| 0.45
Kinetic symmetry	n-e
Discovered by	David Buckingham
Year of discovery	Unknown
Rules
Outer-totalistic rules	B3/S23 – B38/S238
# of rules	22 = 4
Isotropic rules	B3-y/S23-ey – B34c5e6ci7c8/S234ce5ekr6ei7e8
Glider synthesis
Fewest gliders	28†
Catagolue-generated RLE	synthesis
Uploaded synthesis RLE	p40bheptominoshuttle_synth.rle
	†Can be constructed with 15 gliders using the reverse caber tosser universal constructor.
Pattern files
Plaintext	p40bheptominoshuttle.cells
RLE	p40bheptominoshuttle.rle
Identifiers
apgcode	xp40_y53pmwmp3zy24a4wg11x4a4z0oowcepgk0d2y6oozcgc4yec3d8z077yg66
Pentadecathlon ID	68P40.1

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

↑ 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.