Two blockers hassling R-pentomino

	Two blockers hassling R-pentomino
	<a href="/wiki/File:Twoblockershasslingrpentomino.png" class="image" title="Two blockers hassling R-pentomino image"><img alt="Two blockers hassling R-pentomino image" src="/w/images/c/c1/Twoblockershasslingrpentomino.png" decoding="async" width="137" height="77" /></a>
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Pattern type	Oscillator
Number of cells	47
Bounding box	30×19
Period	72
Mod	36
Heat	34.1
Volatility	0.97
Strict volatility	0.70
Discovered by	Robert Wainwright
Year of discovery	1990
Rules
Outer-totalistic rules	B3/S23 – B38/S23
Important rules	Conway Life
# of rules	21 = 2
Isotropic rules	B3/S23 – B34e6c8/S234ce5a6ein7e
Glider synthesis
Fewest gliders	16
Catagolue-generated RLE	twoblockershasslingrpentomino_synth.rle
Uploaded synthesis RLE	twoblockershasslingrpentomino_synth.rle
Pattern files
Plaintext	twoblockershasslingrpentomino.cells
RLE	twoblockershasslingrpentomino.rle
Identifiers
apgcode	xp72_66625dw66y66664abw66zy3ccy8cczyd6995
Pentadecathlon ID	47P72.1

Two blockers hassling R-pentomino^[1] is a period-72 oscillator. It was the first known period 72 oscillator, discovered by Robert Wainwright in July 1990.^[2]

It is made up of two blockers that hassle two blocks and an R-pentomino. It appears in many large guns such as the gunstars and new gun 2.

On January 12, 2016, Tanner Jacobi found a way to replace the blockers with still lifes.^[3] Mark D. Niemiec found a 29-glider synthesis for this oscillator on December 1, 2018.^[4]

x = 26, y = 20, rule = B3/S23
o24bo$3o20b3o$3bo18bo$2b2o18b2o3$19bo$19b2o$9b2o9bo$8b2o9bo$8bo8bobo$
9bo7bobo$5b2o11bo$5b2o3$7b2o8b2o$3b2obobo8bobob2o$3bob2obobo4bobob2obo
$9b2o4b2o!
#C [[ THUMBSIZE 2 THEME 6 GRID GRIDMAJOR 0 SUPPRESS THUMBLAUNCH ]]
#C [[ THUMBNAIL THUMBSIZE 2 HEIGHT 360 THEME 6 GPS 36 LOOP 72 ZOOM 10 AUTOSTART ]]

Still life-supported oscillator, also named as Roseluck^[5]
(click above to open LifeViewer)
RLE: here Plaintext: here

References

↑ Mark D. Niemiec. "Life Oscillators and Pseudo-Oscillators". Retrieved on December 9, 2018.
↑ Dean Hickerson's oscillator stamp collection. Retrieved on May 15, 2009.
↑ Tanner Jacobi (January 12, 2016). Re: The Hunting of the New Herschel Conduits (discussion thread) at the ConwayLife.com forums
↑ Mark D. Niemiec (December 1, 2018). Re: Synthesising Oscillators (discussion thread) at the ConwayLife.com forums
↑ Jeremy Tan (December 1, 2018). Re: Thread For Your Useless Discoveries (discussion thread) at the ConwayLife.com forums

External links

Two blockers hassling R-pentomino at Adam P. Goucher's Catagolue

Roseluck at Adam P. Goucher's Catagolue

47P72.1 at Heinrich Koenig's Game of Life Object Catalogs

[1] Mark D. Niemiec. "Life Oscillators and Pseudo-Oscillators". Retrieved on December 9, 2018.

[2] Dean Hickerson's oscillator stamp collection. Retrieved on May 15, 2009.

[post26652-3] Tanner Jacobi (January 12, 2016). Re: The Hunting of the New Herschel Conduits (discussion thread) at the ConwayLife.com forums

[post66078-4] Mark D. Niemiec (December 1, 2018). Re: Synthesising Oscillators (discussion thread) at the ConwayLife.com forums

[post66077-5] Jeremy Tan (December 1, 2018). Re: Thread For Your Useless Discoveries (discussion thread) at the ConwayLife.com forums

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Two blockers hassling R-pentomino

References

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