a1=0,a2=1,a3=4,a4=9,a5=16则an=
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a1=0,a2=1,a3=4,a4=9,a5=16则an=a1=0,a2=1,a3=4,a4=9,a5=16则an=a1=0,a2=1,a3=4,a4=9,a5=16则an=由题意,可得a1=(1-1
a1=0,a2=1,a3=4,a4=9,a5=16则an=
a1=0,a2=1,a3=4,a4=9,a5=16则an=
a1=0,a2=1,a3=4,a4=9,a5=16则an=
由题意,可得 a1=(1-1)²=0
a2=(2-1)²=1
a3=(3-1)²=4
a4=(4-1)²=9
a5=(5-1)²=16
∴an=(n-1)²=n²-2n+1
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