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public static double evel(int n)
{
double[] c=new double[n+1];
c[0]=1.0;
for(int i=1;i<=n;i++){
double sum=0.0;
for(int j=0;j<i;j++){
sum+=c[j];
}
c[i]=2.0*sum/i+i;
}
return c[n];
}
public static double evel(int n)
{
if(n==0){
return 1.0;
}else{
double sum=0.0;
for(int i=0;i<n;i++){
sum+=eval(i);
}
return 2.0*sum/n+m;
}
}
public static double evel2(int n) {
double[] c = new double[n + 1];
double sum = 0.0;
c[0] = 1.0;
for (int i = 1; i <= n; i++) {
sum += c[i - 1];
c[i] = 2.0 * sum / i + i;
}
return c[n];
}