// output of ./demo/comb/catalan-number-demo.cc:
// Description:
//% Catalan numbers and ballot numbers.
//% Cf. OEIS sequences A009766 (Catalan's triangle) and A033184.

arg 1: 11 == N  [Show N rows]  default=11
 0:      1
 1:      1      1
 2:      2      2      1
 3:      5      5      3      1
 4:     14     14      9      4      1
 5:     42     42     28     14      5      1
 6:    132    132     90     48     20      6      1
 7:    429    429    297    165     75     27      7      1
 8:   1430   1430   1001    572    275    110     35      8      1
 9:   4862   4862   3432   2002   1001    429    154     44      9      1
10:  16796  16796  11934   7072   3640   1638    637    208     54     10      1
