&quot;.  That is, if &lt;d_k, d_(k+1)&gt;
is any pair of adjacent digits in the state index r, then the
value of d_k in the next state is (d_k)' = d_k + d_(k+1).

Table 17-a.  A Couple of Orbits in Fourth Gear:  Orbit 1
o---------o---------o---------o---------o---------o---------o---------o
| Time    | State   |    A    |   dA    |         |         |         |
|  p_i    |  q_j    |  d^0.A  |  d^1.A  |  d^2.A  |  d^3.A  |  d^4.A  |
o---------o---------o---------o---------o---------o---------o---------o
|   