斐波那契數列 (13808)

C1=MAX(SUM(N(INDIRECT("R["&{-1,-2}&"]C",))),1)

D1=IF(ROW(A1)<3,1,SUM(N(INDIRECT("R["&{-1,-2}&"]C",))))

E1=IF(ROW(A1)<3,1,SUM(N(INDIRECT("R["&{-1,-2}&"]C",))))

A1=IFERROR(SUM(OFFSET(A1,-2,,2)),1)