124P21
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| 124P21 | |||||||||
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| Pattern type | Oscillator | ||||||||
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| Number of cells | 124 | ||||||||
| Bounding box | 36 × 25 | ||||||||
| Period | 21 | ||||||||
| Mod | 21 | ||||||||
| Heat | 55.8 | ||||||||
| Volatility | 0.64 | ||||||||
| Strict volatility | 0.30 | ||||||||
| Discovered by | Robert Wainwright | ||||||||
| Year of discovery | 1995 | ||||||||
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124P21 is an unnamed period-21 oscillator that was discovered by Robert Wainwright on February 21, 1995.[1] It was the first period 21 oscillator to be found.[note 1]
It works by using two period 3 caterers and two copies of 44P7.2 to hassle two traffic light predecessors.
Notes
- ↑ A nontrivial period-21 oscillator, such as jam on 44P7.2, could have been constructed from two oscillators of lower period (such as p3 and p7), both of which were known by an earlier date. However, no such LCM oscillators were attested prior to the discovery of this oscillator in 1995.
References
- ↑ Dean Hickerson's oscillator stamp collection. Retrieved on April 17, 2009.
External links
Categories:
- Patterns
- Oscillators with between 120 and 129 cells
- Periodic objects with minimum population between 120 and 129
- Patterns with between 120 and 129 cells
- Patterns found by Robert Wainwright
- Patterns found in 1995
- Outer-totalistically endemic patterns
- Oscillators
- Oscillators with period 21
- Oscillators with mod 21
- Oscillators with heat 55
- Oscillators with volatility 0.64
- Oscillators with strict volatility 0.30
- Patterns with 180-degree rotation symmetry
- Unnamed periodic objects