It's interesting that it works. (179->150->13->1 for me. [I think it is more interesting to discuss paths instead of x and neighbors. A graph plotting all successful paths so far would be ++interesting to see. I wonder if a certain common final sub-path (like above) occur. And which one is it?])

Can we actually assert a 'natural semantic order'? I've always thought this was a fundamental aspect of our cognition, that we have 2 distinct ways of ordering: names and numbers. Outside of lexical ordering (which is ordering a representation not the things themselves), names can at best be ordered in a DAG. Pretty much half of computer science is converting names into numbers so we can compute over them.