Main block of 8-cell mosaics in Symbols for Legacy Computing Supplement

Main block of 8-cell mosaics in Symbols for Legacy Computing Supplement

These were mostly generated from UnicodeData.txt with a dodgy Perl
one-liner and an Emacs keyboard macro.  The dodgy one-liner was (wrapped
onto more lines):

grep "BLOCK OCTANT" ~/Downloads/UnicodeData.txt |
perl -pe '/OCTANT-(\d+)/; $i=""; map{vec($i,$_-1,1)=1}split(//,$1);
          $_=sprintf("%02X",ord($i))." $_";'

Now I need to find the characters elsewhere in Unicode that correspond
with the gaps in the table.