Para 16.0 execute o seguinte como root:
zypper addrepo https://download.opensuse.org/repositories/science:HPC:Backports/16.0/science:HPC:Backports.repo
zypper refresh
zypper install boost-jam
Para 15.7 execute o seguinte como root:
zypper addrepo https://download.opensuse.org/repositories/science:HPC:Backports/15.7/science:HPC:Backports.repo
zypper refresh
zypper install boost-jam
Para 15.6 execute o seguinte como root:
zypper addrepo https://download.opensuse.org/repositories/science:HPC:Backports/15.6/science:HPC:Backports.repo
zypper refresh
zypper install boost-jam