I need help on creating a pyramid

Question

Hi! I can't seem to produce this output. Any help will be appreciated.
1
2 4 6
3 6 9 12 15
4 8 12 16 20 24 28

Answer 1

What you tried so far..? Can we see..?
For j=1 to 2*n
Do print spaces in n-r and n+r values of j, else print number..

Answer 2

this is what I got so far.

int rowss=5, kk=0;
for(int ii=1; ii<=rows; ++ii, kk=0) {
for(int spacee=1; spacee<=rowss-ii; ++spacee) {
System.out.print(" ");
}
int number=1;
while(kk!=2*ii-1) {
System.out.print(number+" ");
number++;
++kk;
}
System.out.println();

Answer 3

Set
int number=ii; //instead of int number=1;

In while loop, change number++ to
number = number + ii;