Period-246 glider gun

	Period-246 glider gun
	<a href="/wiki/File:Period246glidergun.png" class="image" title="Period-246 glider gun image"><img alt="Period-246 glider gun image" src="/w/images/9/92/Period246glidergun.png" decoding="async" width="541" height="481" /></a>
	<a href="/wiki/File:Period246glidergun.png" class="image" title="Period-246 glider gun image"><img alt="Period-246 glider gun image" src="/w/images/9/92/Period246glidergun.png" decoding="async" width="541" height="481" /></a>
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Pattern type	Gun
Number of cells	81
Bounding box	43 × 38
Period	246
Barrels	2
Discovered by	David Buckingham
Year of discovery	1996
Rules
Outer-totalistic rules	B3/S23 – B38/S23
# of rules	21 = 2
Isotropic rules	B3/S23 – B38/S236e
Pattern files
Plaintext	period246glidergun.cells
RLE	period246glidergun.rle

Period-246 glider gun is a true period glider gun with period 246, discovered by Dave Buckingham in June 1996.^[1] The 180-degree mod-123 symmetry of its bookend-based engine makes it trivial to modify it into a double-barrelled gun.

Upon the discovery of R49, praosylen noted that the same stable catalyst can also support the inactive part of the gun.^[2]

References

↑ Jason Summers' jslife pattern collection. Retrieved on October 28, 2020.
↑ praosylen (October 4, 2019). Re: Oscillator Discussion Thread (discussion thread) at the ConwayLife.com forums