Try this
System.out.println("Enter number of entries");
Scanner scan = new Scanner (System.in);
int i,j,k,index=0;
int value = scan.nextInt();
int totalSize= value * value ;
int [] a= new int [totalSize];
for(i=1; i<=value;i++) {
for (j = 1; j <= value; j++) {
a[index++] = i * j;
}
}
for(k=0; k<totalSize;k++) {
System.out.println(a[k]);
}