(n+1)^2-(n^2)+(n+3)^2-(n+2)^2=38
n^2+2n+1-n^2+n^2+6n+9-n^2-4n-4=38
4n+6=38
4n=32
n=8
n+1=9
n+2=10
n+3=11
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(n+1)^2-(n^2)+(n+3)^2-(n+2)^2=38
n^2+2n+1-n^2+n^2+6n+9-n^2-4n-4=38
4n+6=38
4n=32
n=8
n+1=9
n+2=10
n+3=11