Octagon 4

	Octagon 4
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Pattern type	Oscillator
Number of cells	40
Bounding box	16 × 16
Period	4
Mod	Unknown
Heat	48
Volatility	0.83
Strict volatility	0.67
Discovered by	Robert Wainwright
Year of discovery	1979
Rules
Outer-totalistic rules	B3/S23 – B378/S0238
# of rules	24 = 16
Glider synthesis
Fewest gliders	34†
Catagolue-generated RLE	synthesis
Uploaded synthesis RLE	octagon4_synth.rle
	†Can be constructed with 15 gliders using the reverse caber tosser universal constructor.
Pattern files
RLE	octagon4.rle
Identifiers
apgcode	xp4_y1g8bb8gzcc0u1y21u0cczy0124kk421zy311

Octagon 4 is a period 4 oscillator, discovered in 1979 by Robert Wainwright. It consists of a regular octagon with sides four cells long and of four blocks. In August 2004 Jason Summers and Mark Niemiec found a 34-glider synthesis of this oscillator.^[1]

If the blocks are removed, it will decompose into a rare constellation of four ponds.

References