// output of ./demo/comb/ruler-func-demo.cc:
// Description:
//% Ruler function sequence.

arg 1: 6 == n  [Stop when n is encountered in the sequence (==>2**n elements).]  default=6
 0 1 0 2 0 1 0 3 0 1 0 2 0 1 0 4
 0 1 0 2 0 1 0 3 0 1 0 2 0 1 0 5
 0 1 0 2 0 1 0 3 0 1 0 2 0 1 0 4
 0 1 0 2 0 1 0 3 0 1 0 2 0 1 0 6

 ct=64