This is Haycat2009's sketchpad; only Haycat Durnak and Harfordson-Parker Cole are allowed to edit. Everyone else can still use the Sand box to play in. It is located in Level 106 of the ConwayLife tower, but you can only enter via level 102 (Good luck with the Rick clones) or level 107 (try finding the entrance).
A period-345 LCM oscillator. The base reaction is p69. As 69 is a multiple of 3, Karel's p15 can push the beehive back in generations that are multiples of 3, avoiding the two in a row that cause it to fail. No non-LCM completion of this p69 is known. (click above to open LifeViewer) Catagolue: here
Did you know ... that it was unknown whether there existed an unbounded sequence of patterns with greatN-grandparents but no greatN+1 grandparents, until Ilkka Törmä and Ville Salo constructed a solution to this extended grandfather problem in early January 2022?