Via an email from Paul Frommer, we have an official word on the numbering system! Source
Ngeyä pxesìpawmìri ngaru seiyi oe irayo.
‘Awa tìpawmìri ‘iveyng oe set; aylari zusawkrr ‘ayeyng.
[zusawkrr = future; in the future]
I have a nice complete chart, but it wouldn’t be cool if I simply attached it, as I’m sure you understand. Let me convey the essence, however, in a different form.
The system, as you know, is octal:
‘aw, mune, pxey, tsìng, mrr, pukap, kinä, vol
volaw, vomun, vopey, vosìng, vomrr, vofu, vohin, mevol
mevolaw, mevomun, . . ., pxevol
pxevolaw, pxevomun, . . ., tsìvol
zam ( = 64, or 100 octal)
vozam ( = 512, or 1000 octal)
zazam ( = 4096, or 10000 octal)
First line above: In disyllables, stress is on the 1st.
Second line above: In disyllables, stress is on the 2nd, except for mevol.
Third line: Stress on the final syllables, except for pxevol.
That should be enough for you to figure out the rest.
Kìyevame ulte Eywa ngahu,