C :

#include<stdio.h>
void main()
{
int n,a,i;
//printf("The series with equal difference are:\n");
for(n=1;n<=6;n++) /* 公差n 取值为1~6*/
for(a=1;a<=4;a++) /* 首项a 取值为1~4*/
if(4*n+6*a==26&&n*(n+a)*(n+a+a)*(n+a+a+a)==880) /* 判定结果*/
for(i=0;i<4;i++)
printf("%d ",n+i*a); /* 输出前20 项*/
}

C++ :

#include <bits/stdc++.h>

using namespace std;

int main(){
	 cout<<"2 5 8 11"<<endl;
} 

Python :

#m,n,k=list(map(int,input().split()))
#n=int(input())
for a in range(1,23):
    for b in range(1,23):
        for c in range(1,23):
            for d in range(1,23):
                if b-a==c-b==d-c and a*b*c*d==880 and a<b<c<d:
                    print(a,b,c,d)