Small period-3 oscillators

All known period-3 oscillators, which have at least one phase with a population lower than 21. Stator variants of oscillators are ignored; the rotors of each oscillator must be unique.

Signatures are the population counts for the oscillator, sequenced so that the lowest numbers appear to the left. The first signature number has three digits to facilitate sorting when a table includes larger oscillators. Signature numbers are used to break ties in oscillators of nearly the same size.

	Oscillator / apgcode		Cells	Signature	Volatility	FC	Synth. cost
1		Caterer xp3_4hh186z07	12	012-15-16	0.82	32.0	5
2		Jam xp3_695qc8zx33	13	013-14-16	0.56	27.6	5
3		Two eaters xp3_32aczy0354c	14	014-16-14	0.33	38.8	6
4		Trice tongs xp3_04qi3s4z33w1	16	016-18-19	0.35	40.6	8
5		Bent keys xp3_2524sws4252	16	016-20-18	0.73	39.2	7
6		Odd keys xp3_2524sws44a4	16	016-21-18	0.73	40.8	7
7		Short keys xp3_2522ewe2252	16	016-22-18	0.73	41.2	6
8		Bent key and skewed pole xp3_31ecsggocca4	17	017-22-18	0.73	43.0	8
9		Short key and skewed pole xp3_257631176ego	17	017-23-18	0.73	45.9	13
10		Cis-skewed poles xp3_31ecsggsce13	18	018-18-24	0.73	40.2	7
		Trans-skewed poles xp3_31ecsgzy2176ego	18	018-18-24	0.73	[No natural occurrences]	7
11		Trans-block on cuphook xp3_32q4w8ozx11dd	18	018-20-19	0.14	41.3	7
12		French kiss xp3_17844ozx3442sg	18	018-20-20	0.27	48	8
13		Pulsar quadrant xp3_4s3ia4oggzw12e	18	018-20-22	0.42	46.7	8
		Two pulsar quadrants xp3_co9na4oggzw12e	18	018-22-20	0.75	40.8	8
14		Fire-spitting xp3_08ean1e8zoga3	19	019-22-23	0.70	[No natural occurrences]	34
15		Bowed caterer xp3_g39c4g62z3w2u	19	019-27-23	0.78	[No natural occurrences]	44
16		Dual caterer xp3_gooofz1w248ecs	20	020-20-23	0.89	[No natural occurrences]	27
17		Stillater stator variant xp3_8kiq3k4ozx6221	20	020-21-22	0.14	43.6	10
18		unnamed xp3_ggma04roa0koz1	20	020-21-24	0.63	[No natural occurrences]	20
19		Caterer with skewed pole xp3_ciga13zg83937z11	20	020-25-23	0.71	[No natural occurrences]	23
20		20P3 xp3_76ei0c0609ecs	20	020-20-24	0.94	[No natural occurrences]	10
21		Beluchenko's p3 with loaf xp3_32aczy0136blic	20	020-22-22	0.46	[No natural occurrences]	11