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|Number of cells||20|
|Discovered by||David Buckingham|
|Year of discovery||Unknown|
Eater/block frob is a period-4 oscillator found by David Buckingham in 1976 or earlier. Composed of an eater 1, a block, and what is roughly a melusine, it is essentially a tub-with-tail eater constantly being hassled. "Frob" is used by MIT as a generic term meaning "thing".
- 20P4.4 at Heinrich Koenig's Game of Life Object Catalogs