// output of ./demo/comb/ruler-func1-demo.cc:
// Description:
//% Ruler function (one-based), 2-valuations of 2*n:
//%   1 2 1 3 1 2 1 4 1 2 1 3 1 2 1 5 1 2 1 3 1 2 1 ...
//% Loopless algorithm.
//% Cf. OEIS sequence A001511.

arg 1: 6 == n  [Stop when n+1 is encountered (==>2**n - 1  elements).]  default=6
  1  [ 1 1 1 1 1 1 1 ]
  2  [ 1 1 1 1 1 2 ]
  1  [ 1 1 1 1 2 1 ]
  3  [ 1 1 1 1 3 ]
  1  [ 1 1 1 2 1 1 ]
  2  [ 1 1 1 2 2 ]
  1  [ 1 1 1 3 1 ]
  4  [ 1 1 1 4 ]
  1  [ 1 1 2 1 1 1 ]
  2  [ 1 1 2 1 2 ]
  1  [ 1 1 2 2 1 ]
  3  [ 1 1 2 3 ]
  1  [ 1 1 3 1 1 ]
  2  [ 1 1 3 2 ]
  1  [ 1 1 4 1 ]
  5  [ 1 1 5 ]
  1  [ 1 2 1 1 1 1 ]
  2  [ 1 2 1 1 2 ]
  1  [ 1 2 1 2 1 ]
  3  [ 1 2 1 3 ]
  1  [ 1 2 2 1 1 ]
  2  [ 1 2 2 2 ]
  1  [ 1 2 3 1 ]
  4  [ 1 2 4 ]
  1  [ 1 3 1 1 1 ]
  2  [ 1 3 1 2 ]
  1  [ 1 3 2 1 ]
  3  [ 1 3 3 ]
  1  [ 1 4 1 1 ]
  2  [ 1 4 2 ]
  1  [ 1 5 1 ]
  6  [ 1 6 ]
  1  [ 2 1 1 1 1 1 ]
  2  [ 2 1 1 1 2 ]
  1  [ 2 1 1 2 1 ]
  3  [ 2 1 1 3 ]
  1  [ 2 1 2 1 1 ]
  2  [ 2 1 2 2 ]
  1  [ 2 1 3 1 ]
  4  [ 2 1 4 ]
  1  [ 2 2 1 1 1 ]
  2  [ 2 2 1 2 ]
  1  [ 2 2 2 1 ]
  3  [ 2 2 3 ]
  1  [ 2 3 1 1 ]
  2  [ 2 3 2 ]
  1  [ 2 4 1 ]
  5  [ 2 5 ]
  1  [ 3 1 1 1 1 ]
  2  [ 3 1 1 2 ]
  1  [ 3 1 2 1 ]
  3  [ 3 1 3 ]
  1  [ 3 2 1 1 ]
  2  [ 3 2 2 ]
  1  [ 3 3 1 ]
  4  [ 3 4 ]
  1  [ 4 1 1 1 ]
  2  [ 4 1 2 ]
  1  [ 4 2 1 ]
  3  [ 4 3 ]
  1  [ 5 1 1 ]
  2  [ 5 2 ]
  1  [ 6 1 ]
 ct=63
