  We define some physical variables associated with the traversing sequences of
electrons along the orbit which is a 2D projection of 8$_{18}$-knot. The
configuration is regular but the resulting contributions, which are related to
the physical variable, of those combinations from all the possible states to
the fixed spatial sites show certain irregular behavior near the over- or
under-crossing points of this knot. The possible explanation for this kind of
direct geometric consequences is made to linked to the physical insight.
