Slightly less than 1⁄3 of all numbers are followed by their negatives. Usually it goes a, -a, b, c, -c, d, etc., but (1) the first x,-x pair isn’t until the 7th/8th numbers, and (2) sometimes there is a longer gap and (3) there are a few places where there’s a shorter gap and we go x, -x, y, -y.
Most of the breaks in the (a, -a, b, c, -c, d) pattern look like either the +/- pair was skipped entirely or the unpaired value was skipped. My guess is the complete message consists of alternating “packets” of either a single value or a +/- pair, and each packet has some chance to be omitted (or they are deterministically omitted according to some pattern).
Slightly less than 1⁄3 of all numbers are followed by their negatives. Usually it goes a, -a, b, c, -c, d, etc., but (1) the first x,-x pair isn’t until the 7th/8th numbers, and (2) sometimes there is a longer gap and (3) there are a few places where there’s a shorter gap and we go x, -x, y, -y.
Most of the breaks in the (a, -a, b, c, -c, d) pattern look like either the +/- pair was skipped entirely or the unpaired value was skipped. My guess is the complete message consists of alternating “packets” of either a single value or a +/- pair, and each packet has some chance to be omitted (or they are deterministically omitted according to some pattern).