A3=A1+A2=2同理得到A4=3A5=5A6=8A7=13A8=21A9=34A10=55A11=89A12=144
1,1,2,3,5,8,13,21,34,55
a1=1 a2=1 a3=2 a4=3 a5=5 a6=8 a7=13 a8=21 a9=34 a10=55