 In November of the same year, he was one of the ten founding members of the OuLiPo (Ouvroir de Litt´erature Potentiel).And in 1961, with his friend and colleague Marco Sch¨utzenberger, he initiated the S´eminaire sur les probl`emes combinatoires de l’Universit´e de Paris (which later became the Equipe combinatoire du CNRS).At the same time, Berge achieved success as a sculptor.