[tromp]

Actually the ratios are correct [1], but the typo is in my inferred orbit count for planet 6 which should be 9, not 8. Well spotted!

[1] https://cdn.mos.cms.futurecdn.net/DEAyqYXn7pfD7ZboApakhe-120...

[neilkk]

This makes sense, since if all the orbit numbers were even the ratio could be expressed in simpler terms.