#N 48P31
#O Matthias Merzenich
#C The first known period-31 oscillator
#C http://www.conwaylife.com/wiki/index.php?title=48P31
x = 24, y = 13, rule = b3/s23
7b2obo2bob2o7b$2o4bo2bo4bo2bo4b2o$2o5bobo4bobo5b2o$8bo6bo8b6$8bo6bo8b$
2o5bobo4bobo5b2o$2o4bo2bo4bo2bo4b2o$7b2obo2bob2o!