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.


  [ dup 1+ * 2 / ]       is triangulared (   n --> n )
 
  [ number$ tuck size - 
    times sp echo$ ]     is rightecho    ( n n -->   )
 
  [ dup triangulared
    number$ size 1+
    0 rot times
      [ i^ 1+ times
        [ 1+ 2dup 
          rightecho ]
        cr ]
    2drop ]              is floyd        (   n -->   )
 
   5 floyd
  cr 
  14 floyd