唐·雷布尔显示了a(8)<1.9*10^42,参见链接。
a(8)<=1081110928802931278119466637766147737122,
a(9)<=6850672946809600696044301071559918192380244,
a(10)<=96037988156124494415303285590850571857698741869620,
a(11)<=9044737840075556371215937303485030235666252755947862558252154847122。(结束)