Floyd's triangle   lists the natural numbers in a right triangle aligned to the left where

 the first row is   1     (unity)
 successive rows start towards the left with the next number followed by successive naturals listing one more number than the line above.


The first few lines of a Floyd triangle looks like this:

 1
 2  3
 4  5  6
 7  8  9 10
11 12 13 14 15



Task

 Write a program to generate and display here the first   n   lines of a Floyd triangle. 
(Use   n=5   and   n=14   rows).
 Ensure that when displayed in a mono-space font, the numbers line up in vertical columns as shown and that only one space separates numbers of the last row.


procedure main(a)
    n := integer(a[1]) | 5
    w := ((n*(n-1))/2)-n
    c := create seq()
    every row := 1 to n do {
        every col := 1 to row do {
            width := *(w+col)+1
            every writes(right(@c,width))
            }
        write()
        }
end