I landed on this page hoping to find a solution for SQLITE as this was the only answer I found when searching for this same question for SQLITE.
The final solution I found was from this article here
Float Middle Blog – SQLITE answer
Hope it helps someone else out 🙂
the simple solution being:
SELECT DISTINCT id +1
FROM mytable
WHERE id + 1 NOT IN (SELECT DISTINCT id FROM mytable);
genius.