#N Catacryst #O Nick Gotts #C A 58-cell quadratic growth pattern. #C www.conwaylife.com/wiki/index.php?title=Catacryst x = 2555, y = 1772, rule = B3/S23 2350bo204b$2350bo204b$2348b2o205b$2347bo207b$2347bo207b$2347bo207b$ 2347bo207b6$2377bo177b$2376b2o177b$2374bo2bo177b2$2374bobo178b$2375bo 179b133$2552b2ob$2553b2o$2553bob29$2538bo16b$2537bobo15b$2539bo15b$ 2540bo14b1489$1201bo1353b$1201bo1353b$1202b2o1351b$1204bo1350b$1204bo 1350b$1204bo1350b$1204bo1350b17$1180b2o1373b$1182bo1372b$1182bo1372b$ 1183b4o1368b50$3bo2551b$2b2o2551b$o2bo2551b2$obo2552b$bo2553b11$30bo 2524b$30bo2524b$28b2o2525b$27bo2527b$27bo2527b$27bo2527b$27bo!