List of 18 ancestors found in 40 iterations (18 distinct persons and 18 positions into tree)

Generation 0 - 1 person(s) on 1 (1 distinct persons)
Generation 1 - 1 person(s) on 2 (1 distinct persons)
Generation 2 - 2 person(s) on 4 (2 distinct persons)
6Joseph Chevreul (~1737-)
7Anne Guesdon (~1736-)
Generation 3 - 2 person(s) on 8 (2 distinct persons)
Generation 4 - 4 person(s) on 16 (4 distinct persons)
Generation 5 - 8 person(s) on 32 (8 distinct persons)