#N Callahan's infinite growth
#O Paul Callahan, 1995
#C Ten cells inside a 5x5 box that grow forever - the smallest bounding box known to do so. Paul Callahan found it in 1995 by exhaustive search.
#C Exported from Lifeform
x = 5, y = 5, rule = B3/S23
3obo$o$3b2o$b2obo$obobo!