// output of ./demo/comb/pascal-demo.cc:
// Description:
//% Pascal triangle.
//% Cf. OEIS sequence A007318.

arg 1: 15 == n  [Compute first n rows]  default=15
  0:    s=    0   
  1:    s=    1      1 
  2:    s=    2      1    1 
  3:    s=    4      1    2    1 
  4:    s=    8      1    3    3    1 
  5:    s=   16      1    4    6    4    1 
  6:    s=   32      1    5   10   10    5    1 
  7:    s=   64      1    6   15   20   15    6    1 
  8:    s=  128      1    7   21   35   35   21    7    1 
  9:    s=  256      1    8   28   56   70   56   28    8    1 
 10:    s=  512      1    9   36   84  126  126   84   36    9    1 
 11:    s= 1024      1   10   45  120  210  252  210  120   45   10    1 
 12:    s= 2048      1   11   55  165  330  462  462  330  165   55   11    1 
 13:    s= 4096      1   12   66  220  495  792  924  792  495  220   66   12    1 
 14:    s= 8192      1   13   78  286  715 1287 1716 1716 1287  715  286   78   13    1 

