Note that the index numbers are only technical numbers which have no persistence. After a new system generation is done, all of them are invalid. To generate a persistent link, use the name.Use the URL:
http://ww-person.com/cgi-bin/l3/LANG=fran/F=Johann@Aloys@I.@Sebastian@Ignaz@Philipp/N=zu@Oettingen-Spielberg
Johann Aloys I. Sebastian Ignaz Philipp zu Oettingen-Spielberg
alternatively: /cgi-bin/llmult/LANG=germ/P=38000575
Johann Aloys I. Sebastian Ignaz Philipp zu Oettingen-Spielberg